I’m 5 weeks, 3 days (I think, some apps have said I’m over 6 weeks)

Anyway, this is my 3rd baby, I’m 36, and am I crazy or is it possible to already be feeling my belly stretching? The lowest area of my abdomen and right below my ribs are aching and if I stretch it feels like I’m pulling a muscle. I haven’t had an exercise, so I know it’s not that.

Do you think I could be feeling my belly getting ready? I don’t remember this happening for several months with my last 2 kids.