Beginning Sunday, I started spitting blood mixed with mucus in the morning when I woke up, not alot about a spoonful. I don't have any other symptoms (no cough, fever etc) and I feel perfectly fine, the only difference being sometimes during the day I have excess saliva mixed with mucus (no blood) that I spit out now and then. In the mornings though I feel a salty accumulation at the back of my throat and i get out of bed and spit out blood . It started after I drunk some rum, straight, on Saturday night maybe that's the cause but im not sure. Is this something serious?