Did I grow too fast, is this going to be a problem?

I was just watching a TV show, and there were girls that still weren't through with puberty when they were 16, I'm going to be sixteen next month, and I'm finished growing, I haven't grown since 7th grade, I started my period around my 8th birthday, I'm still petite in the waist, but I've been in a B-cup (Yes my boobs are small, I know) , And my butt has been huge (I have a Kim Kardashian donk -____-) since 7th grade as well, I'm only 5 two and a half, and am not growing anymore, did I grow up too fast if I was already this size at 13? And haven't gown? Will this later on effect me, and is it normal?