I'm glad your ok and yes when chest pain keeps coming and radiates its best to get it checked out. I have unstable angina and we control that with meds, but my EKG's are normally normal- mine was picked up on a holter monitor they made me wear for 24 hours, it records your hearts system and then they read it afterwards. It could be gastric related too because they both use the same muscle group, thats why a lot of people think their having a heart attack but its reflux related instead.
I'm praying for ya that its not shingles! Those are horrible to have my grandfather had them to the point he couldn't wear a shirt because it made him hurt. Prayers for you that everything will be fine.