Swollen vagina

I'm 39 weeks pregnant. This entire pregnancy I've had swelling down there and itching on and off. Had my doctor test me for infection and everything came back normal. I've been super red, irritated, swollen. My clit HURTS and itches. The inside and outside of my vagina are inflamed. Well I had sex with my boyfriend today since my doctor ruled out infection and said it was normal pregnancy symptoms. When he slid inside of me I felt tighter than normal but didn't think much of it. Well after sex, I went to the bathroom and had creamy yellowish discharge and a lot of it. Ive been losing my mucus plug for awhile so that's not exactly what alarmed me but then I went to wipe and it hurt. Looked down, and My vagina is damn near swollen shut. I couldn't even fit a finger tip in my vagina. The swelling is already going down but im so confused. If this isn't a yeast infection what is it?! Because after sex even my clit and vaginal lips get super red, irritated, itchy, and swollen. Like my vagina lips get huge. It hurts. I told my doctor how uncomfortable I was and he didn't seem too concerned. Did a cervix check and at the time of my cervix check, I wasn't swollen down there and even if I was he wouldn't have noticed because he didn't even look when he did my cervix check. I feel so raw and dry 😭