I had a flu and i'm slowly recovering- I mainly just have a cough now that I think is breaking. Why I'm worried is because I cough up mucus and when I did once there were some streaks of blood in it- not a lot just a little. Now I am afraid to cough up any more mucus. Also I have been sweating at night- not where everything is soaking wet, just where my pillow is lightly damp- I think this is me just flushing the flue out I hope. Is this normal do you think?