I moved to the south a year ago and at this time of year I started getting headaches. Went to the doctor, he did a bunch of expensive tests, found out that I had pretty bad sinus infection so he gave me antibiotics. Now it's that time of the year again and I feel exactly the same, but I can't afford to go back--I'm still paying for what my insurance didn't cover last time I went! It'll be even worse this time because I'm a college student with NO health insurance. How can I get antibiotics for sinus headaches again?