Feelings disgusted by having underarm hair.
I shave because I can't stand it, but I do sometimes wish it didn't feel as disgusting as it does for me so that I didn't have to bother myself with the whole shaving and plucking ritual that I do.
Also periods. And trying to judge when it's going to strike. According to how many days it's been since my last period, I should have come on yesterday but I didn't and now I'm probably going to come on tomorrow during one of my exams and I just hate you Mother Nature.