I know where you are coming from. I would think after only 6 days, a pulling sensation where the incision is could be normal. Plus when you think of what they did, there's bound to be some things still going on and healing.
For me I have a 'feeling' on my left side sometimes and wonder if I overdid something? It's been six weeks since my surgery. I had a similar feeling before surgery which I referred to as a kink or thought maybe things were backed up at the stricture. But now it's been removed? Will have to monitor it more closely and see if it coincides with what I am eating? My incisions are on the right side.
Never did have diarrhea before or even right after surgery so can't comment on that but size and amount of stools still vary from day to day. I think diet plays a big part in that.
Good luck with your recovery. Sounds like you are doing fine.