I have sex with my boyfriend of a year occasionally with no condoms (I'm on birth control). Only sometimes after it stings. It's a different feeling than the not-enough-lube after burn. It stings like when you put some type of medicine/lotion on your vagina that you shouldn't (hoping I'm not alone in having done that). We've both been tested, so STDs are out. I don't have a UTI (I had one recently and was just retested). I don't have the same sensation from giving him a blowjob. Any insight would be welcome!