Consistent BV

I feel like I’ve been having trouble with BV for months now and I have no idea why. My actual vagina doesn’t give a smell but my underwear and even my pants do after wearing them. It’ll go away for a couple days at a time. I don’t know what’s going on. I haven’t been intimate with anyone in at least 4 months. I feel gross I have an OBGYN appt in November because that’s the soonest I could get in