Right, I just was adding more validation that you can't trust the fact that it's not the left arm as to an indication that it can't be related to heart.
I don't know your age... but I've gone through a couple of 'odd' symptoms and traced back some of them after other things have happened to figure some of them out. And with the exception of the breathing issues (which may end up being panic if the other symptoms concern you) - I have had those same symptoms. A few more... but your list was definitely a subset of mine.
Obviously, what happened to me doesn't mean it's also happening to you... but if there's any clues in here that might help you find something that might apply to you - it might not hurt for me to post them.
I suffered from "odd" right side sensation - my entire right side felt numb-ish, tingly, JUST OFF and DIFFERENT from the other side of my body, in fact I couldn't sense the temperature quite the same - tied to B6 toxicity (of course, this is more theory than anything else as no one could tell me much about resolving b6 toxicity).
At the same time I struggled through episodes of severe dizziness, with blurred vision... while not diagnosed and it resolved on it's own for the most part - I think I am actually suffering through acute periods of dysautonomia or POTS. Not totally sure, but I have those two labels in my back pocket if I struggle with this again to bring up to attempt to get diagnosis.
Severe fatigue, PEM, loss of focus, chronic whole body ache, sore throat, etc. etc... - I'm thinking that this goes back to ME/CFS and until we get diagnostic markers;
Severe left leg cramps - probably most likely magnesium deficiency. NOTHING has helped except epsom salt baths... my magnesium did not get tested until after I started the baths and has tested low normal... I'm not willing to stop the baths long enough to see if it drops my magnesium level as they help very much.
Odd pains in my left side and my left arm - no idea - the worse my leg is? these start hurting. If I can keep the leg from getting so bad (see baths), these never get too bad. -- my theory? Is that I probably had key "past injuries" or "weak points" that when the magnesium deficiency got too bad, they suffered the most. If it had been my hip... then I might have added hip to the list.
Sensation of someone trying to drill a hole in the middle of my upper back with a broom stick - could it have felt like a brick in my back? Absolutely. Turns out it was tied to referred pain from my gall bladder after years of recurrent pain that stopped suddenly upon surgery. I did have two episodes of it returning post-surgery - but acupuncture treated the gall bladder pathway? They were gone immediately upon treatment.
Sudden severe nail through the joint pain in my toes - gout.
Add the ache-y knee from where I had my ACL reconstruction and that's pretty much my list.