Don’t know what this would be, need some advice

Hey ladies, I’m 19 and have a small issue. Not so much a problem but somethings that I would like to stop from happening. I have been with my fiancé for a little over a year now. We started having unprotected sex when I was on birth control ring for about 2 months just so my body would get used to it and get on track. So my issue is that recently I’ve been having this uncomfortable, kind of itchy and burning sensation when we are finished having sex or after he fingers me. I’m not sure what this is or how to explain it to a GYN. Do you ladies have any idea what it could be?