Headache for a week help?

Ok I need to admit last week was pretty stressful for me and it pretty much went on my health. It all started with a headache, then like in a sequence everything has gotten worse. I had sinus pressure so far (now it's almost gone) sore throat and nasal dripping (driving me nuts!!), lightheadedness, sleeplessness, and a continuous headache. I took tylenol, allergy medicines, but none of them worked. I really need a good sleep but I just can't! Also, the pain is localized in the back of my head, around the area where my neck and skull connects. HELP!