When did you go through puberty?

I feel about as unlucky as a girl can get. I'll be 21 this year and have just started to develop serious acne and weight gain problems. As a teenager my skin was always clear and I remained roughly the same weight until I was 18. Not to say I didn't go through puberty. I still went through all the hardships of puberty, but it seems that NOW is the time I get all the evil aspects of it. Anyone else deal with it in their 20's? I feel like I'm too old to be starting acne problems.