My 19 year old son and I have both just been to the doctor - although not official, he said we probably had the swine flu. Tamiflu has helped, but my son had the worst headache of his life with this, and I had one also. With the tamiflu the headache went away pretty quickly, but we both had nausea, chills, achy body. We both had a cough before the headache started as well. Hope this helps.