I am 25 weeks pregnant and a few weeks ago, I noticed this raised bump on my (pardon my vocab) "taint"?

Earlier this year, I tested negative for an STD and I've repeatedly asked my fiance if he has any, to which he always declines. Over the past few days, I've noticed more of these raised bumps down there and have no idea to what they can be attributed. I know I should ask my doctor, and I plan to at my next appointment, but it's really bothering me. It feels like that area is sore sometimes, but the bumps themselves don't actually hurt.