Yikes, sorry to hear that. My kitten had an umbilical hernia when he was a baby kitteh and I had to keep (gently) pushing his guts back into his belly so he wouldn't get intestinal strangulation. I can still feel the stitches when I rub his belly. Sorry I have nothing helpful to add. You should call your doc and explain the urgency and try to get a visit sooner. Friday is awfully far away.....