Lately my vagina and breasts have been killing me !! What could it be?
Are you going through puberty (I am assuming that you are because of your age). It's normal to experience breast tenderness and other pains, because of fluctuating hormones, they could even last a while.
Otherwise it's usually an indication that your period is close by.
my advice is ; your either pregnant , or its period pains
its more likely to be period pains tho
hope I helped !