I don't cough hard, or often, thought cough was side effect of blood pressure meds,(New). Twice I have spit up small globs of phlegm w blood in them, looks like a clot. I haven't been sick, no colds or flu this year. I do not, never have smoked. I take synthroid, adalat, metoprolol and acid reflux med. What could b wrong to cause you to cough up bloody phlegm? Not bright red?