I'm afraid I don't have any experience with your actual question, but I did want to reassure you that it's amazing how little blood it takes for *all* the water to go bloody. (Like, my wife peeing with her period will turn the whole bowl bright red, and that has to be a few drops of blood at best!) So if you're primarily seeing bloody douche water, keep in mind that it might be as little as a few drops of blood mixing with a lot of water; if you wear a pad or pantiliner and don't see much blood on it, there's probably no immediate cause for concern. Brassard's rule of thumb for "too much blood" was completely soaking a full-sized pad every few hours, in fact... Similarly, if there's no large amounts of unexpected green or bright yellow discharge, foul odor, or fever, it probably isn't an infection.
You definitely should check with your surgeon or GP - whichever seems appropriate - if you're concerned, but there's no need to panic in the meantime.
