I notice about 3 days now when I cough or sneeze I get a pain in my stomach, my right side of my chest and the right side of my back?

Musculoskeletal.... These pains are likely musculoskeletal in nature: coughing can lead to muscle strain, cartilage inflammation, rib fracture, etc. Once the cough resolves, the musculoskeletal pain will also slowly resolve. See your doctor for diagnosis and treatment of the cough!