Cramping

I have light cramping sometimes not always, but I've noticed that when and after I orgasm (sorry tmi) I cramp for awhile.. Not like miscarriage cramps, just light cramping... Is this okay? Should I stop having sex or doing sexual things with my SO until after we have the baby? I don't want to miscarry because of something stupid like having sex.. :( I don't want to miscarry at all, but if this could cause a miscarriage, I'd like to know that way I know if we need to stop or not.