Painful sex for 3 years, doctor didn't help

So I had sex for the first time 3 years ago. And it was excruciating. Most painful thing I've ever felt. It's gotten better since then but it's still painful every single time especially when he first puts it in, I'm plenty wet, it's not a friction burn or anything it more feels like trying to shove a potato through your belly button. It feels like I'm being stretched to the brink and that I might rip in half. After a few minutes it doesn't hurt very much anymore but it's completely numb and I get 0 pleasure out of sex at all I can barely feel it. I went to the doctor and she did an exam and was absolutely no help. When she put 2 fingers in me I told her it hurt really bad and then she told me I had an imbalance of bacteria and gave me medicine and didn't even mention anything about the pain. Has anyone had anything similar? I'm going to a different doctor hopefully soon but if anyone has any ideas I would love to hear them thank you <3