What do contractions feel like?

Brooke

I feel silly for asking but I get period like cramps on occasion and they don't hurt at all. I can't really tell when they start or stop because it's not supper noticeable. I'm just wondering if this is BH or not. I'm 29 weeks tomorrow and I get these cramps a couple times a week or so. I thought maybe it was my uterus still stretching but I don't know?...