I am 40 years old and had a gastric bypass 20 years ago. About 4-5 years ago my stomach turned from the saggy loose stomach I had been sporting for years into a more firm and round stomach that resembles a beach ball. My husband accused me of hiding a pregnancy. At that time, there was no weight gain and I was I steadily holding at my regular 125-130 even though I no longer looked it. I gained weight during covid, but even at 160 I look much, MUCh larger. What could be the cause?