I think I have sleep anxiety, or insomnia. At least every other week, I have a night where I have to take my melatonin pill. This week, I woke up in the middle of the night Sunday, slept well Monday, and had to take a melatonin Tuesday and last night. Every time I have trouble sleeping, I worry about it all day, worrying that I'll never sleep well again, that the melatonin will stop working, that I'll have trouble sleeping next week, etc. I'm getting tired of it.