Roaccutane, strong pain in left shoulder (joint pain), back in certain positions & chest tightness. Hard to breath sometimes?

-220 pound, male -Got roaccutane 40mg due cystic acne (did steroid cycle) -attached bloowork 2months after cycle (is the estradiol abnormal?) -My face has been cleared but severe acne preavil on shoulder back and chest (2 months on treatment) -3 days ago I got hard pain in left shoulder, then tight in back and finally chest, hard to breath deeply, only ibuphoren helps -doctor said it was from gym (even tho I hardly trained while on treatment), and gave me bloodowrks (waiting for them)