okay so recently my nipples have been seriously burning/ stinging. I'm not pregnant. I have the nexplanon implant. I'm 16 years old. I looked this up and found that my boobs might be growing?? but I have no clue. all I know is that my entire nipple hurts. it's very sensitive. even just to touch. can someone please tell me what's going on and all?? thank y'all in advance!