C section incision pain

Marie
I just had a c section 4 days ago and when I cough (which is a lot lately) I get a burning feeling only on the left half of my cut on the INSIDE of my body. It doesn't feel like it's my skin, it feels more like it could be under my skin or something and that side of my cut it also numb to touch. Like I can't feel my skin when I poke it with my finger. 
Before I left the hospital my OB said my cut looks really good... So I wasn't worried, but it hasn't went away yet. Just wondering if this is a normal thing to feel or if I should call my OB and mention it again?