I have a hiatal hernia. When I do a sit-up, a large bulge appears about the size and shape of 1/2 of a football. The bulge disappears upon lying flat. It bulges when getting into or out of bed. The doctors and imaging simply say "so don't do sit-ups" and don't seem to be too concerned. I have no pain with it, but I am concerned. I am female, age 61, 5'5", 245 lbs. What do you suggest?