It might help to know that much of what sensation we feel inside the vagina is *because* of the clitoris, the internal portions of it, which are considerably larger than the parts many people think of as the whole thing, the hood and the glans. Past the first inch or two of the vaginal opening, the vagina itself doesn’t have a lot of sensory nerve endings. But all the parts of the clitoris do.
So, it sounds like you’re saying that you most enjoy sexual activity where something is inside your vagina. The good news about that is that it is usually a lot easier to make adaptations with hands, fingers and toys, that with a penis, given the way a penis is connected to the body.
So, how about starting with some experimentation with new toys (sounds like what you may have is a hard plastic vibrator, and for sure, those often don’t feel great and aren’t even made for internal use), and with you and your partner’s hands and fingers, in positions that don’t cause you pain?
Can I also ask if you’re on any medications for nerve pain? If not, those could potentially significantly improve your life and sex life.