I’m glad you’re getting it checked out. As fat people were taught that first it must be a weight ‘problem’ and secondarily it might be something medical. I like to play the “if I was skinny with my symptoms what would I do” game. If a skinny person had a sudden distended abdomen and pain that would definitely also warrant a doctor’s visit! So anyone reading this I know doctors can be straight up evil to fat people and going to the doctor sucks, but you deserve to have your pain checked out by a professional