I've had flu symptoms for about 48 hours, and I've been coughing up the usual yellowish mucus with the odd red streak. But just recently I had felt extreme pressure in my throat, and ended up coughing out this mucus covered, pink, rubbery blob in 3 parts. There was immediate relief but about ten minutes later I can feel something again. There is obviously a lot of blood in this, it is overall pink but with bright red streaks all throughout. It won't slice with my fingernail, and if I push on it, it returns to it's shape. What is this?