Try Astroglide, or Probe. I never have sex without lube. Try it on your vulva and inside your vagina and on his penis. I bet it relieves your soreness. Not only that, the commercial sexual lubricant enhanced their lovemaking in general.
Commercial lubricants are the slippery secret of sensational sex.
But vaginal dryness isn't a medical problem. And even among women who self-lubricate well, lubes enhance sex. I consider them the greatest invention since refrigeration. I just don't understand how people can think they're having good sex without using a lubricant. Sexual lubricants have never been a focus of sex research, but all available evidence suggests that not many lovers use them.