<human>: I just woke up from a nap and had a stabbing pain on the right side of my chest under my breast. When I move my right arm the pain gets extremely bad until I just lay it down. I am also getting a pain in the back of my right arm. Im 20 weeks pregnant and worried.
<bot>: In most probability the pain which would increase or decrease with SRM movement is local in origin and NOT heart, so be reassured.  I believe the kind of pain you describe and the circumstances in which it has occurred, is mostly probably due to a nerve compression as a result of position you took during the nap.  It would resolve in a day max, some warm compress will help, may take a single tab of paracetamol 650 mg SOS, which is perfectly safe in pregnancy.  Regards Chat Doctor. 