What can cause pain during intercourse?

I am feeling increasing pain during intercourse. After 10-15 mins it starts to feel like he is making me raw and like a tearing feeling. I tried different positions, lube, and got rid of the ultra ribbed condoms thinking that might be it but that didn't help. I also seem to have trouble having an orgasm. I have one without sex easily, but when my partner stimulates me during sex, I can't get one no matter how much I am stimulated. I think the pain is the most significant part. What should I do?