Why?

Why is it that Sunday night I don't sleep well? Why can't it be Friday or Saturday night where I have the option of sleeping in the next morning? Why is it that my mind picks Sunday night to run wild and think of everything possible? Why does it have to be Monday today? Why do I have to be SO tired today? Why did I only get about 4 hours of sleep last night?

I'm exhausted today and struggling to be here. I couldn't fall asleep forever last night. Then when I did, I kept waking up every hour or more. I had the most bizarre dreams....scary in fact. My mind kept going and going, not letting me get any rest. Ugh! I hate that I pick Sunday night to have a terrible night sleep, when the rest of the weekend was fabulous and I slept great. Seriously, why is it the night you need sleep to function the next day you can't seem to get enough?