I believe I have a rebound headache and/or a cold. I think my headache is a rebound headache and not caused by the cold because it hurts constantly, even when I go to sleep, and I did take a lot of medicine(tylenol for 2 days , and advil for the next 2 days). I also have a ton of mucus that I need to spit out. So I was wondering if cold medicine would worsen my rebound headache.