TMI 31 weeks

Very embarrassing to post, lol but I need advice. So like… I was “exploring” down there and I felt this tiny knot inside on my vaginal wall. It doesn’t hurt, it isn’t big, no discomfort when touching it. I’ll be 31 weeks tomorrow and I have a Dr app NEXT Thursday. Is this something i should call the dr about tomorrow or wait til my next app? I have PCOS but never has an actual vaginal cyst if this is one. Super nervous considering I’m very pregnant.