labor signs??

Tatum Ann ❤️
I'm a FTM and don't know what to be looking for.. I feel really off. Baby is moving perfectly normal and everything but I seem to be having a lot of bowel movements (TMI) and I just feel .. crampy down there I guess is the best way to describe it. She feels very low and I also have this tickling feeling in what I can only assume is my cervix? Just looking for opinions and others experiences. I'm so nervous that I'm not going to know I'm in labor lol 
Forgot to mention that it felt like a bone down there cracked earlier today. It didn't hurt or anything but it felt and sounded like it cracked.