Why do sex keep hurting?

So I lost my virginity to my husband over 3 months ago. We have been constantly trying to have sex but it's not satisfying for me at all. Sometimes it's nice but most of the time I felt pain. It's either he goes too deep and hit my cervix or the bottom part (the skin in between your vagina & butt) hurts. I do get wet but it drys up quickly and tenses up after the pain. We managed to complete everytime but I'm sick of this pain now that we are trying to conceive. Help!! He's big and I'm smaller down there. I'm just trying to figure out if it will eventually get better or do I have to deal with this the rest of my life?