I was recently diagnosed with strep and a sinus infection. I was given the rocephin shot and then prescribed cefdinir for an extra 10 days. I can assure that this medication causes my reflux which brings up my anxiety but I am also getting cold intolerance where I am extremely cold and then I'm still cold when I cover up and I sweat. Anybody else have these issues. I finally came back to work but these things are not working out in my favor. I'm wondering if I could just call my doctor to switch or just stick it out. Would a z-pack work to cure strep and sinus infection?