I'm built like the letter P💀😫

 Hey, I am  14 years old and I am having issues with having abnormally large breast. I am pretty developed for my age considering a lot of adolescents my age haven't even hit puberty. Last time I checked, which was about 7 months ago, I was a size 36c bra size, now it obviously has increased since then. But my problem is when my menstrual cycle comes around, my breasts increases by 2 cup  sizes! I am not a very "thick" girl, I am actually very slim, which is what makes it harder. I also do not really have a big butt so, I look like the letter P straight up.💀 It's at the point where no sport bras work, and when i wear loose shirts, I look like a box💀  my goal is to have an hour glass body and to get a thicker, straight up, I just want to be built l like an upside down letter P. 💀 Helppp