@woreiedinNYC. Maybe it's interessting to google myofacial pain syndrome and reffered pain patterns from trigger points. Although i strongly recommend a in person physical examination to make sure if and which muscles effected. You can gain some insight on it if you search it. One sided headeaches are a sign of something muscular going on. Physio can help loosen it up again, psycho can help prevent it from happening again because muscular problems often stems from stress (even with physical injuries psychological stress can prevent injuries from healing).