9 months of chronic headaches

I am 24 and have been experiencing chronic headaches for 9 months. The frequency and severity of these headaches has become much worse and I am concerned. The headaches occur at least 5 times each week, and range from a 2/10 (which I won't take pain meds for) to an 8/10 (at which time I realize that I must take 3 ibruprofen to get it under control). I saw my doctor about this in september. The only answer I received was that it was likely tension headaches, caused by stress, and that they would subside if I could control my stress levels. I called back in October, when the pain was so constant and unbearable that it was compromising my ability to perform at school. After coaxing, the doctor had me get a CT scan, which came back normal. In November I had x-rays done by another physician; they too were normal. She suggested I see a chiropractor. I am very concerned because in the past three weeks, I have had pain all but 5 days. The only way to stop the pain is to take ibruprofen, and sometimes I have to ice the back of my head for 30 minutes or more. I have noticed that I get a mild headache when I exercise, which makes me concerned. I recently graduated, and no longer have insurance. Any suggestions?