I am sooooooo tired, all the time! Or at least most of the time. Is it possible to have insomnia that comes and goes? My roommate asked me if I had insomnia, and for a long time, sleeplessness for me comes and goes. Sometimes it's so bad, I don't sleep hardly at all. But there a times that I get in bed and can fall asleep early and even when I wake up at night, I go back to sleep. Some times I don't wake up at night. Sometimes I have good sleeping habits for weeks or even months, but once I mess up those habits by staying up too late (for whatever reason, my fault or not), then sometimes it's hard to find those habits again. 
Right now, however, I have just been tired. I overslept today, so even though I went to bed late, I got my 6-8 hours...but I still feel tired. I have sleeping pills, but I have a hard time waking up after taking them. I sleep too long. One time, I too it about 9 or 10 at night (but wasn't in bed til about 11 or so), and still had trouble getting up before 11 the next day. I learned that If I let out some of the medicine, I can handle it better. Also, I was taking vitamins, and I have to take half a pill, or it completely drains me! And I still don't take them everyday. 
Being so tired most of the time stresses me out. Also, I've been irritable a lot more lately........and my arms really hurt right now....I feel like I'm physically falling apart.