I've been having what I think is a panic attack for nearly two days straight. I can't sleep at night, all I want to do during the day is sleep. I'm constantly on the verge of crying, I've broken down sobbing. But, I'm still outwardly functional. I feel like death but I'm still going to school, and doing my normal tasks. They make me feel so much worse but I'm not broken down to the point I can't force myself to do anything. It doesn't seem like the normal symptoms of a panic attack and it's lasting so long. I don't think it's slowing down at all. I cry myself to sleep then wake up terrified. If it's not a panic attack what is it? How do I stop it I feel so awful.