Wow, where to start. First of all, my son has some similar issues. We were blessed to get a scholarship to a Catholic school which requires a uniform. He has an exception not to have to tuck in his shirt because he cannot tolerate it. The most severe indicators for us are his shoes and socks. We go thru more shoes and socks than anyone on the planet, opening packages in stores, looking for one that will "work", then stocking up only to find out in a couple days, they don't "work" any more. Sometimes the same socks, only 1 pair will "work" and we have to wash them every night. Same issue with long pants and sometimes even shorts that bind at the knees. No tags in the shirt, no "scratchy" fabrics. He has issues in school because of his quirks, outbursts, likes to hear himself talk, loves to flip, run fast, skip, tumble, fall down,. spin around, etc. Peers don't know how to take him. The school counselor actually had a talk with the class to explain that his brain doesn't work like theirs, and it seemed to help, but I don't know if public school would take that kind of time. His grades are still good which I am told is unusual but I' thankful for that. He will have a complete meltdown if we try to force him to wear something that doens't "work". The OT therapy isn't covered by my insurance at the only place that seems to know what to do with him, OT4Kids. The therapist there is awesome, takes time to explain what is going on --- and the explanation that I hang on to is that the thousands of transmitters in the body communicate messages every second to our brain and kids with SPD have problems because the brain doesn't receive organized messages. It doesn't translate the sensory messages correctly. Once you know how to respond and train the brain, it gets easier. We have 3 brushes that are used on my son's body 3 times a day, and that wasn't working fast enough so the therapist recommended a certain variable speed massager that we now use in addition to the brushing 3 times a day. This thing is POTENT and seems to really do the trick. It is supposed to speed up the process of getting the brain/body communication organized. We were also told that a big ol' wad of gum in the mouth is helpful to tire him out. Once when the brushes didn't work before we had the massager, I used my hands to massage his feet for a while before trying the socks again and it worked. It's really hit or miss, but the OT will help. You are lucky if you can find someone who will take the time to empathize and educate you. I bought 3 books on Amazon.com and I read as much as I can online. Connect with people who know more than you, take any advice and all advise, use what works, dump what doesn't work and move on to the next suggestion. It is overwhelming, exhausting, and requires a lot of work. I was told that it takes about 6 months or more before we will start to see a significant difference. I have to tell you that as awful as that sounded, it was music to my ears just to know there would be a light at the end of the tunnel.

I am new here, so this is all very helpful information. For the longest time, atleast 5 years now I have been so sure that my 6.5 yr old son has SID but its like no one believed me or recognized it as a disorder or problem that needed a closer look for my son, to this day I am still working on him getting diagnosed! He has only recently been given the diagnosis of ADHD (like two weeks ago) But I know there is much more! My son hates stickers, I mean if someone is walking towards him with a sticker in their hand he will almost yell out, "No! Put that away! I hate stickers!" But has no trouble working in books that are "sticker stories" where he can control it, just as long as the stickers arent touching his hands too long. He is sensitive to smells. He takes Karate classes and when the classes are small and organized (5-6 students) he does so well. HOWEVER if the class is large like today there were 16 students, my son acts out, talks a lot, acts silly, spins around, he is clearly stressed and overwhelmed by bigger classes (I even asked him today why he was making such poor choices today in karate class and he flat out told me: "Mom I hate big, busy classes like that, its just too many people and so many different things happening and I just want to go to small class...") We cant control size of class, it depends how many kids show up in that color belt timeframe, sizes of class vary from Mon-Sat. Our son also struggles with:
Loud sounds
Others naughty behavior
Texture and color of foods
Texture of items
Color Red bothers him (he can cry at times)
Cant stand tucking in his shirt so it stays untucked
Hates, HATES STICKERS
Certain socks he wont wear
Certain pants he wont wear
Hates Juice, any fruity drinks unless its strawberry and banana smoothie
Spins around when overstimulated
Does exhibit some defiant behavior.
Handwriting is sloppy
Writing stories is hard for him at times but he loves learning

Our son is a smart, energetic, fun little guy, I just want to get him as much help as possible, as soon as possible.
When his teacher shared concerns I was all open for help. Now he sees the school counselor once a week and Speech and Language for social language (his reading is great!), and Finally just got evaluated and might get OT at school too.
The teacher is hinting to me constantly that its high functioning autism but I'm not so convinced anymore. In fact I want to get him an evaluation by a private Neurologist or Psychiatrist that can do the evaluation in their office so I dont sit on a waiting list for the next 4-6 months for a center I was recommended ( a very long wait list) I dont think I should wait til my son is almost done with first grade. Will try to keep updates on here if it helps anyone.