Pregnancy after c section? Pain in lower belly?

Momma of 4
Okay who has been pregnant again after having had a c section? My 3rd baby was a c section (she's 15 months now) I'm 17 weeks pregnant, starting to show and I feel like my lower belly is hurting as I'm getting bigger. It's not ligament stretching pain (although I've had that as well) it's in the middle in my incision area. I asked my dr about it, she said if anything it should hurt less because the scar tissue is less sensitive due to surgical nerve damage. Anyone have this experience?