Thanks for writing to us.
1. A burning feeling in armpit with a painful spot which is tender to touch is surely not related to your heart. but you must see your physician to know what it is and why it is so.
2. tickling near jaw can result from hyperventilation
. pain of upper jaw can not be because of heart but pain in lower jaw may occur in heart attack
. the characteristic feature of anginal discomfort will be that it comes with exertion/ emotional stress
and disappears with rest. it should last for sometime like at least 3-5 minutes and should not be provoked locally by eating. A prolonged tingling
for hours together without any other problem will also be disfavoring heart pain, as heart pain for hours together should result in full heart attack.
hope i cleared your doubts.