So frustrating

I got 2 hours of sleep last night! There is something seriously wrong with my brain! I couldn't sleep in ANY of the 3 glorious days of the long weekend - I was awake at 7 a.m. all 3 days, and couldn't get back to sleep (I tried Saturday, but basically didn't bother on Sunday and Monday). Then, this morning, I woke up at 4 a.m. and could not get back to sleep. I stayed up later than any night of the weekend last night, reading, because I wasn't sleepy. I just don't know what's wrong with me. I WANT to sleep. Why can't I???