Hey there! It is important to know what is 'the trouble' on sleeping on that side. It is a good thing that you are able to walk, run and raise hands. It is required to know the intensity of injury. Anyhow, when a person has soft tissue injury not resolved yet, it would cause trouble in activities also like moving the arm also and not only sleeping on that side. Please understand this point. Dynamic activity is something superior to resting position. I would advise you to visit a cardiologist just once.
Next Steps
visit a Good cardio-respiratory specialist. Stop doing exercise for now.
Health Tips
do not worry. Stay Happy.