The cramps always happen when you orgasm but you feel them while pregnant because of the extra pressure in you uterus. You have more vaginal discharge while pregnant making you extra lubricated so you may think you feel looser but you're not and for me now that I am 28 weeks it feels more normal other than the weird pressure in my bell from the baby.
I agree as well! I'm further along now but noticed my lady stuff just didn't feel the same pleasure! I've Been practicing kegals whixh has helped quite a bit