Cramps at 15 weeks

Hi ladies! So I'm currently 15 weeks and I've been feeling lots of cramps this past week (feel lile period cramps, the kind that keep you awake at night, but it's not severe pain). It's nothing insanely painful or anything, but I was just wondering if anyone else felt this at this stage in their pregnancy and if it feels normal..? I don't have bleeding or anything else, just cramps. 
Thank you :)