When I cleared my throat this morning to cough up any mucus/phlegm, I've noticed a blob of yellow phlegm with blood. I have noticed yellow phlegm the past week in the morning. It's usually not yellow anymore in the day(back to white) & occasionally there's a blob of blood, only in the morning. I don't feel like I've got a cold, no cough & I recovered from the flu almost 2 weeks ago. I might have sinus though.

Does anyone know anything about this? Is it normal?