My abs and ostomy wound, ouch!

So I am 3 1\2 weeks out from my closure. My wound finally stopped draining at 3 weeks and seems like it is closing up. My question is since it stopped draining and spears to be closing it has been more sore. Not the wound but feels more like muscles right behind the wound or just above. My abs right there feel tight or weak at the same time. Like if I am standing up too long I want to slouch because it hurts to stand up straight. Only other time it hurts is if I am laying completely flat. If my legs are bent or I am on either side it doesn't bother me at all.

Is this normal? I've been wearing my high waisted spandex leggings to try and help hold my belly in and that helps. I feel like a need some ab support.