Having had an ostomy for 18 years now, I can tell you without hesitation that your stoma is going to change in appearance from time to time. In fact, I can't think of any bodypart that hasn't changed in the last 18 years, LOL. As long as your stoma stays relatively pink, doesn't show signs of fistulas, obstruction or prolapse, your doin' just fine. It's normal to be a little paranoid about
every little change in appearance after you've had your surgery. I know I was.
P.S.- Though my wife has never changed my appliance, she has emptied for me a few times when I was in the hospital. Now that's love!!!