Spinocerebellar Degeneration, Vagus Nerve Is Involved, Stabbing Pain, Difficulty Breathing. Done Biopsy. Explain

thank you. i am homebound on home care with spinocerebellar degeneration, mixed per biopsy. my vagus nerve has proven to be involved. i am on calcium channel blockers for many years for a variety of heart arrhythmias since i've been told its my vagus nerve, not the heart itself. i do have a dual a-v nodal pathway. i have been in heart units more times than i can count. i have a DNR now but i have a new/recent heart spell that hapening frequently which is sudden, severe, will knock me down if standing, lower mid right chest just under breast. pain is sharp, stabbing, unbearable. and i can vomit and have a barking cough with it and can have very difficult time breathing. it can last anywhere from minutes to hours