It just doesn't make any sense...really.

I'm having trouble sleeping lately. I wake up freaked out about whatever I was just dreaming, but can't remember the details....just that it was scary or sad. Getting back to sleep is difficult with my heart racing and my mind running on overdrive. And it bothers me that I can't remember my dreams. Normally, I remember them vividly, good or bad, but the last week or two, nothing. I don't get it...