IT HURTS!

Adi
Me and my boyfriend had sex only very recently, when he went all the way in it hurt so bad but it doesn't normally. 
However my whole abdomin and the uterus area feels very sore if you just put a slight pressure on it. 
It's really made me wanting to not have sex with my boyfriend for a while as it hurts that much. 
Have you girls had this before? 
What should I do??