Id like to try and help you but I need a bit more information. When you say "light headed" do you mean actual light headedness, or a sensation that you or the room you are in is spinning/ disequilibrium?
What happened two weeks ago, did you start to have a cold then that is now "the cold that wont go away"?
Do you have any medical conditions or take any medication? If so, what?
I am sorry, I am stumped myself here. I am going to opt out and refer this question to another Expert. I really hope you get the information you need and you feel better.