Pregnancy After C-Section

I’m 37 weeks into my second pregnancy. My first was a c-section. I’ve just started having contractions but they aren’t too regular. They’ll last for a few hours (maybe 5-10 minutes apart) and then stop for half a day, repeat. They are definitely different than Braxton Hicks. They are painful but I can still talk through them most of the time. But I’ve started to have a lot of pulling / pressure / pain where my c-section incision was / scar is. Is that normal? Anyone experience something similar?