Belly bulge after diep revision surgery

Has anyone experienced a belly bulge after diep surgery? I had stage 2 revision surgery the end of April and recently noticed a bulge the size of my thumb below my bellybutton and incision. It’s not painful, it’s soft. I sent pictures of it to my plastics and they said it looked like fluid collection and to come in And they’d look at it. I got there and they said it did not look or feel like a fluid collection but could be a diastasis. So tomorrow I’m having a Ct scan. The closer I get to the scan the more nervous I get that this is a tumor. I don’t think my bulge looks like typical diastasis pictures I’ve looked at and no one really seems to think it’s a hernia either. Anyone had just a bulge after diep surgery? What was it and how was it treated?

Thanks for your reply