Hi welcome to HCM.. Your pain could be musculoskeletal pain... In which usually costochondritis and muscular strain can be resolved with the time ... Ibuprofen drug useful for that ... If costochondritis present than physiotherapy help can be taken in form of transcutaneous electrical nerve stimulation.... Rule out anemia and hypothyroid also by HB estimation and tsh estimation as these two condition can lead muscle weakness and pain can be there .. To clear your doubt regarding respi problem investigate with chest x ray... Avoid bad sleep posture ... If needed neurological examination needs to be done. Advise : consult neurologist for your examination... Take care