Cramp question..

Monica • had a little girl 11/14/15 & now were #2 very excited :)
Hey ladies! I just found out 2 days ago after a missed period that I am pregnant :) however I'm sure it's nothing I just need a little reassurance anytime my SO and I fool around when I finish I noticed I sort of tense up and get cramps right this anything to worry about or is it normal and everything is good ? Thanks in advance!