I Had Sexual Intercorse With My Boyfriend. We Have Been

I had sexual intercorse with my boyfriend. We have been for 1 year and we both have never been with other people so we don't have std's. But one of my vagina lips are swollen and the area itches and burns alittle just because of the itching. I have no discharge at all and it only hurts when I pee cause of how bad I have been itching. Do you think it is just irritation? This isn't the first time and it usually goes away with in a few days