Recurring Vaginal Cut at Fourchette w/ Sex

[wzeng]

Everytime I have sex I feel like there is some type of cut at the fourchette of my vagina. However, the actual sex isn't painful, it's only after the sex is over and I touch it. If i don't touch it I can't feel a thing. But I know when touching it that if I were to have sex again it would tear more. Skip to the last 2 bullets if you just wanna read what's currently happening to me
-I'd like to start at the beginning of the story and hopefully some of you have answers for me. 6 weeks ago I had sex in a pool there wasn't any initial lubrication and he had to force in, which I think cause the initial fourchette tear. I could visibly see in the mirror and camera a cut at my fourchette. We did not have sex for 2 weeks and I felt healed and normal after 3 days. However as soon as he came back the cut opened right back up.
-I saw the doctor a week after (having sex the night before so she could see the cut) and she just said it was dryness (which it could have been at the time) and I should have no sex for 2 weeks and gave me an estrogen cream. We waited the 2 weeks and had sex again.
-Two weeks later had sex. Instead of a visible tearing it was just a stinging irritation (almost like burning but not really). I know if I had sex again it would open the cut.
-Now my process is to wait 3 days between each time I have sex. The "cut" feels like it heals in a day or two and I feel normal again. Sex itself is never painful and now we're using water-based lube. It's painful when I touch it afterwards because I can tell its irritated/stings or cut enough that it could open more if i had sex again the next day. Each time the cut either opens at the fourchette (never anywhere else) or my fourchette feels irritated like it could open the cut. Every time I have sex and pee right after it burns, but two hours later when i pee again it's normal. I have been using coconut oil nonstop throughout this process.
-Other details: a week ago i got swabbed and got diagnosed with my first yeast infection (my only symptoms were the burning while peeing after sex and the cottage cheese like discharge, no itching) which I could have had for a week before that swab. I took diflucan and have no discharge now. Maybe the yeast infection was because of antibiotics i took for a bacterial infection 6 weeks ago, but the yeast infection really couldve happened 2 weeks ago. ITS NOT HERPES. got tested by the doctor for it just in case. I am on Junel oral birth control (for the past year and a half).

This literally all started that one time I had sex that wasn't lubricated. Before that I was having regular sex almost everyday for a year with absolutely no problems and no lube.

Do you think it's an underlying issue? Are my hormones out of wack from my birth control? Was it an ongoing yeast infection that I never noticed? Do you think I just need to heal longer with no sex? I need some insight please! It's bearable now, but I'm afraid it'll get worse.