Braxton hicks very much tightening of the tummy (not painful) However from a lot of experience the knife in your bum, I’ve been struggling with constipation since before I fell pregnant and it can very much cause pain in your bottom especially when you’ve got trapped wind and everything is so compact and a lot of pressure.
The tight stomach feeling sounds like Braxton Hicks! The knife being twisted up your bum feeling sounds like constipation if I’m being completely honest 😂🤷🏻♀️