Scared to mess around with my hubby.

Brit.tanyyy👑 • Soon To Be Mommy👶🏻😘 20 Years Old👑. 10/29/2016✨
So I just got done messing around with my hubby you know and I started cramping it wasn't bad cramps.. I mean I get them on and off all the time. I don't know if I'm over reacting or anything. I'm just really worried. Because I'm pregnant with my rainbow baby and I don't want nothing happen to Him Or Her! 😔 I'm already in love. 
And I'm 4 weeks & A Day Pregnant. 
Should I be acting like this?