I'm just getting over a sinus infection. Still having headaches the top of my head temples down the back to my neck. My arms neck and back are achy?

See a doctor. Preferably start with your primary care doctor. The question is whether or not the sinus infection has been adequately managed or has extended beyond the sinuses. All of the symptoms you describe may be due to tension of holding your head in a single position while you had severe sinus disease, but the best thing to do is to see a doctor.