C diff is a bacteria that can often invade your bowels after antibiotics and cause diarrheah and bloody stools . Most of the time it comes after antibiotic use but this is not always the case. The antibiotics wipe out the good bacteria which usually can keep this in check so the cdiff takes over. Thats why its a good idea to always take probiotics when you are on an antibiotics and never take antibiotics unless you are sure an infection is bacterial. The bug is notorious for being picked up at hospitals but there have been quite a few cases found that are community aquired in recent years. C diff can cause colitis as well which is inflammation of your colon. This often results in the bloody stools and sometimes fever and flu symptoms. It is a hard bug to eradicate since it forms spores and they can lay dormant and the antibiotic to treat it does not kill the spores so often multiple rounds of antibiotics are needed to be cured.
You could also have ulcerative colitis not caused by c diff which can cause bloody stools.
If your bleeding continues call your dr and ask for an immediate appointment or go to the er to be safe. You really do need a colonoscopy to find the source of the blood.
My general practitioner brought up a the mention of a colonoscopy and an upper gi, but I can't see my specialist until the 26th. I haven't been taking any medicine lately, except maybe the occasional tylenol (only a couple times a month). What is cdiff?
have you been on antibiotics lately? Could possibly be cdiff. A stool test can check for this. I would say a colonoscopy should also be considered.