Help!! it's swollen

Hey girls! Have you guys ever had a swollen labia?? I recently had a Uti and was treated for it about 3 weeks ago. Today I was a little itchy down there so I took a mirror and looked. Seems like the right side of my labia is a little swollen. It's not the entire labia, just the upper part closer to the clitoris. It looks a little red and irritated but I don't think it's herpes bc it doesn't look like a scab, just swollen. I don't think it's an std bc i haven't had sex in about a month. Anybody know what it could be??