Slight chest pain on left to middle part of the chest only when i stretch across or turn over sometimes happen on right side to what can it be ?

Chest pain: pain only on stretching is likely to be musculoskeletal. Heart pain will not come on stretching alone. watch out for other symptoms like pain on deep breathing, fevers and pain on coughing. if that happens then se your doctor as it may be because of lung infection. but what you mentioned seems to be muscle or bone pain. simple pain relief and stretching exercises should be fine for now.

The symptoms you: are experiencing are most likely related to the muscles and bones of your chest.