Cramps? 31 weeks 4 days?

Tianna
anyone else hit 30 weeks and start getting what feel like the 'period cramps' you get days before and thats how you know you're going to start & the shitty feeling in your back? because I've been getting it a lot and I don't know if I should be concerned. 😕 
EDIT : I also had a c section Sept'15 if that makes a difference in these cramps.