Am I abnormal, help me?

I was one of the first to hit puberty at the age of 11 in my class, I'm 16 now, 17 in november, and my boobs are so small it's ridiculous. No guys are interested in me, all the other girls with D' boobs flaunt it and get so much attention. I had an ex who even said that his man boobs were bigger than my boobs. It is really effecting me mentally, I cry every night because of it, I'm so insecure, I have hated my body for 4 years, everyone just seems to be growing up, and I was the first, now I look like I have the body of a 11 year old. When I went to get fitted I nearly broke down because I was scared I was smaller than what I thought I was, I wore a 32B but was in denial that I was actually an A cup or smaller, I got measured to be a 30D but even then, that's not much bigger :/ I'm so tired of being this size, I haven't grown one bit since they started. I have ruined my relationship with my partner because of it. I even went to the extent of buying 'breast enhancer' pills online, which didn't work, not that it suprised me.. I want to go to the doctors because it's stressing me out. I'm 5ft 3 (yep, not only do I have the body of an 11 year old but also height wise too), and I weigh 8 stone (I can't put on weight because of my metabolism being too fast) my mums side of the family have medium sized boobs and my dads side of the family have big boobs, so what's going on? :'(