What did your early pregnancy cramps feel like? How long did they last? Did they come and go?

Alexis • Expecting our sweet baby boy in April.💙 I thank God for giving me such a wonderful opportunity!
So I'm having some cramps here and they're in my pelvic region along with some slight round ligament pain. My question is: What did your cramps feel like and how long did they last? Were they constant and mild? Did they come and go?