Swollen Vagina Lips

Anybody else ever experienced this? I'm 27 weeks pregnant and this is the first time this has happened, this is my second pregnancy. I was fine one day then felt my vulva was swollen & it looks bumpy it's not herpes or anything like that, but it hurts to touch it, it stings & I've had them be swollen/ bumpy for like 3-4 days now. Help.