vaginal swelling?

Ok. I'm posting anonymously because this is super weird to me. I feel like my vagina is swollen. I have some pain when I'm moving that reminds me of my first days after giving birth. I had a few stitches but according to two different doctors at my postpartum check ups, everything looked fine. I feel like this symptom comes and goes. I check and there is definitely bulging of some kind at the entrance to my vagina but then when I check again in a few days, it's normal again. I haven't had sex for a while. I'm pretty active - walks daily and 6 times a week I ride my exercise bike. I hope it's not the activity that's causing this but I can't think of anything else. I have no other symptoms at all - just slightly uncomfortable from time to time. I'm embarrassed to go see the doctor again since I was told by 2 different docs everything looks fine... what would you do/what have you done if you have the same issue???