Sex hurts

So my husband and I have been together for two years married for 5 months. Sometimes it doesn't hurt but I don't feel any satisfaction out of it, and other times it's just painful. I think the main problem is I can't relax because I'm afraid it's going to hurt but I really want to be able to feel how good it's suppose to feel because I love my husband dearly and I want to love him right. He is very understanding and supportive. It's not uncomfortable to where he can't make love to me so yes he still gets it lol I just want to know why i can't feel what everybody else feels ..?