I have no & I hate my life. End of.?

Basically, my mum is a DD and was around a B/C in year 8 or so, ..so why the hell do I have absolutely NOTHING. I actually hate myself, it's stopping me from wearing a bikini or a vest top or going to the beach with my friends. It's so annoying, I have been patient but I am so sick of being so flat chested. size is hereditary I get told over and over, I KNOW, so what the hell is wrong with me. I just hate waiting for years on end, especially as I got my period almost 2 years ago.