Weird contraction feeling type cramps

Caitlin • 21 years old. First Son was born 02/18/2013 - Adopted. TTC for baby #2 but baby #1 for us.
I know weird. But around my c section I feel like I'm getting weird contraction type cramps. I'm feeling that tightening, then relief. 
TBH idk if I'm even explaining it right. I feel so weird right now! 
My period should be here in 6 days. Anyone else TTC and get that type of feeling?