You are not crazy. I went for a long time before I got help, but finally did. Left untreated anxiety may get worse, but if you seek help and have patience you will get better. I suggest seeing your doctor 1st. I take xanax when I get that shaky feeling before a panic attack, and the xanax totally keeps me from having panic attacks. It is nothing short of amazing. I am an assistant teacher, so I take my meds and I don't have to worry about freaking out in front of people. And yes, panic attacks do come out of nowhere because anxiety disorders are chemical disorders. Too much adrenaline pumps though your body for no real reason when you are having an attack. Medicine can block this chemical response. Also, look up relaxation exercises online until you can see your doc. Good luck!

The adrenaline you are talking about it produced by you, not a chemical imbalance. For example: You are driving down the highway and the car in front of you slams on their brakes. You slam on yours missing their bumper by an inch. Are your knees wobbly? Are you short of breath? Panic stricken? YES! Is that a chemical imbalance? NO! The problem with panic disorders is that your brain is stuck in panic mode. Your anxiety has probably reached an all time high and your nerves are sensitized. The adrenalin pumping through your body is caused by YOUR thoughts. How do you stop that adrenalin? When you finally accept that fact that it's just panic, your not dying, your nerves are sensitized causing all these freaky symptoms, you stop running, and you stop the fear cycle, you will then see your brain and body mellow out. It does take time. Another important note--crazy people do not know they're crazy. Just by you worrying that you are..simply means you are not. :) Hang in there!

You are not going Loca, although it may feel that way while you're going through a panic attack. I have had them for many many years now. They steam from events that occured during my childhood. I went without medication for a long long time but to no avail, I could not suffer needlessly any more.
I would always suggest trying everything possible before resorting to medication, but in my case it is the only thing that has worked thus far. And, I have tried "everthing" I am still trying whatever I can. I am slowly trying what Anxiety Ridden has explained. It has worked some of the time and that is with the medication. I am not going to give up and you shouldn't either. It is a great way to beat this fear, athough a work in progress.
Try breathing exercises while your at your desk. They help alot too!
All my best to you!

Well dont feel too bad I did go to the hospital from work one day cause my blood pressure and heart rate went so from panic. Next day I was fired........I was within the first 90 days so they didnt have to give a reason but I knew why.