It's normal. As you reach your orgasm, your uterus contracts and you experience contractions, and as your pregnancy goes on and your belly gets bigger you can actually feel your stomach get rock hard after you orgasm. But as long as you are not bleeding or in excruciating pain, it's normal.
The cramps go away and there hasn't been any bleeding
Yes it's normal. If ur cramping doesn't subside or u have any bleeding u should talk to ur doc bcuz it could be serious.