Loosing my virginity

is this normal. Or is there something wrong. Every time me and my boyfriend try to hook up. And he tries to stick it in. Even when he goes slow. My whole vagina starts to get cramped up and it hurts. Including my clit. But he fingers me with 2 fingers. And that's About the width of his penis. Is something wrong with me? I'm 15 and this is my first time