Excessive

Why do I feel so completely useless? What is so different between yesterday and today? Why did I feel so calm and relaxed and actually good yesterday, and here I am today with a chance to relax and I feel terrible? My heart is pounding and I can't focus and it's so unenjoyable.

I wish I knew why I had to suffer through this. Why I have some free time but waste it worrying and feeling like crap. I watched a movie, and worked on some website stuff, and did a homework assignment... I've accomplished things, but I can't relax. I feel like I'm doing something wrong...