For the past few days, the crotch in my underwear has been turning grey, even black looking. I wore a pad yesterday and I didn’t notice anything on the pad, so I went back to wearing plain underwear and the grey/black color showed up again. I check the toilet paper every time I wipe and it looks normal, milky white discharge, no strong smell. It makes me think it’s something to do with my panties and not something coming out of me, but I am almost 15 weeks and feeling paranoid about it. I have had increased pelvic discomfort lately but that could be down to the uterus expanding/round ligament pain, etc. I did call my OB and the nurse didn’t seem concerned. My next appointment is in two weeks and she said we can just check it out then. Anyone ever have anything similar??