I, too, go a little nuts looking for blood, and chocolate often puts forth a pinkish blood-like liquid, in addition to the foods you mentioned.
I try to remind myself that a little blood is not something to get upset about
if the rest of the symptoms are improving. As long as the general trend of symptoms is for the better, that is positive progress.
This disease makes us all care about
things the rest of the population tends not to think about
. Instead of being "nuts" I see us all as keenly self-aware.....