Something's just not right

Well, after having a rather productive weekend, something changed in my body and I'm suffering from some sort of an anxiety attack that just won't disappear. I haven't been able to figure out what triggered this on Sunday, but something must have happened. Sleep has completely disappeared altogether. I have managed 2 hours this morning, but that is the first time that I've slept since Sunday. I am exhausted, but not able to calm myself down at all. I will be taking some sleeping pills tonight in order to try and lower the anxiety somewhat. I really don't want to go that route, but it looks like I pretty much have to because I feel the progress that I've been making slipping away.