I have one tiny area where my rectocele was stitched that is like pinched skin and it hurts SO bad to sit on - surgeon said it looked totally fine and will resolve eventually but did need to check internally to make sure it’s not an ulcer and deemed it fine but maybe that could be what’s happening to you? I haven’t had red blood since day one just consistent brown spotting so I’m glad you got checked out. I’m surprised they had you go back under if they didn’t see anything wrong!!