I called but he said try blistex it just showed up today
I would definitely call and ask your doctor. There's just too many possibilities.
It's on the inside of my lip not my gums tho and only in one spot not all over:/
Could be oral thrush I got it once as an allergic reaction the penicillin I don't think it Hurt but was uncomfortable and I had blisters all inside my mouth just go see a normal doctor no need to see a dentist unless they tell to which is doubtful
Your gums have become irritated it's common in pregnancy, I'd recommend seeing a dentist and just having everything looked at.