BV During pregnancy !

So as soonest I got pregnant this was this first change to my body. My Ob told me it was normal and Not to worry. I have had Meds and of course all My STD test/ Negative to make sure Im not over reacting for a peace of mind. This comes and Goes I’m currently 24 weeks and this discharge drives me crazy it’s a bit yellow and it itches ones it’s touches my skin. no order or anything else .. They have check me multiple times but I always get the same answer. This has become the worst part of my first pregnancy any advice? Anyone has experienced this ?