Breast buds and small breasts at 15/16??

Hello. I’m 15 (almost 16) and I’ve had my period since I turned 13. I’m 5’4 and 107 pounds. I’ve had breast buds since I was 11 and I haven’t changed AT ALL. I look pretty flat and almost as if I have inverted nipples but it’s just breast buds. It’s almost as if I started breast development and I just suddenly stopped while everything else proceeded as normal (periods, height etc.). I also have (somewhat) irregular periods and a very hairy stomach. All of this makes me VERY self conscious. I am very concerned about it. Is there anyone with the same problem? Or is there something wrong with me?