Hi there ~
I understand your concerns. I believe that the description of your symptoms more likely is due to the palpitations. Having a recurrence of shingles
in the same area may also cause you to have these side effects. I also believe that the pain in you foot is related to the same condition. If you lose weight you may get rid of a lot of neuropathic pain
symptoms. I also believe that you should consult a local doctor to help with the symptoms and to see if this is an ominous sign of a bigger underlying disorder.
I hope this helps. Take care and have a lovely day!