I'm a 42 year old female non-smoker who has a fear of lung cancer. I normally have a bit of post-nasal drip/phlegm each morning. Today I had some and it had a small speck of blood in it, and I am terrified. I haven't had any respiratory infections in over a year, no bloody nose, etc. so I have no idea where this came from. Should I request a CT of the lungs or am I overreacting? Has anyone else had this happen to them and it turned out to me nothing serious? I am really scared.