Yeah, I think you should get both things checked.

I had a granuloma develop where I had my epi, about 8 weeks PP. It was a PITA, but it's gone now (had it removed). It didn't really hurt, just sort of more achy, like you described. You probably don't have anything wrong, it's probably just normal healing, but it's always best to be on the safe side.

I'm not sure what the tummy thing is, but do you know if your abdominal muscles separated during your pg? Maybe they're taking a long time to get back to normal?

I would go back to your OB/GP and have both things looked at. Good luck hun, I'm sure it's nothing.