Hi I'm 29, weight about 135, I'm 5 feet tall, never had any medical problems, I had a cold/flu and then after that cleared I had a headache , felt like pressure behind my eyes, would not respond to dayquil, so I figured it was sinus headache, I took some over counter sinus medication and it worked, but I have no congestion. I have never had any sinus problems before, however its been 2 wks and I still can't sleep well. I wake up with a headache in morning and my undereye cirlces are darker. Its not unbearable but I don't feel 100 percent.