blood scare

Yesterday I was freaked out....I intubated as usual and had so much air trapped that just wouldn't come out and I was hurting beyond that I extubated...went and layed down and then got back up and re-intubated...it relieved the air pressure that was tugging under my belly button, but then it only released red blood....fortunately not too much, but I was having a heart attack seeing it. I called my doctor and they stated that this could happen occassionally and as long as it doesn't continue or happen in subsequent intubations that it's ok. I must have irritated the valve...after all this is my intestine and it does bleed like anything else. I fortunately did not experience any more blood thru the night so I'm hopeful this was a one time occurance.