Like the other posters, I tend to withdraw. I will withdraw from even my family. The sleep problem can go either way. Sometimes I sleep alot, but then at night, when i should be sleeping, I can't seem to get my eyes closed.
My eating habits change. Most of the time, I personally will eat more than normal, and it's usually all junk. Sometimes, though I don't want to eat at all.
I also overreact about stupid little things. And god forbid something big happen, I completely lose it. That's what happened with this last episode. A big change came about, and I just couldn't handle it.
If you see yourself being different than usual, in just about any way, you need to examine yourself, and start working towards not allowing yourself to "fall into the pit" as I put it.