Tired

I am very tired this week. I don't know why, but I am more tired than normal. Last night I went to bed at 11:30 and the night before, I went to bed at 9:45! I haven't been to bed that early since I was pregnant and had a toddler to contend with.

Recently, I've been exercising and taking vitamin B to help. So far, I notice I am not comatose driving home so it must be helping a little. The problem I have is that sometimes, I cannot sleep, so I'm afraid if I take something, perhaps it will keep me up all night. Which is fine, becuase I'm functional when this happens, but when I finally crash, I crash hard.

What do you do to stay awake during the day?