Hi Charmed3, first, welcome to HealingWell and I'm sorry you're going through this. I'm sure it's frightening. There is no moderator in the Heart Forum unfortunately but some members who have knowledge of heart problems sometimes post and can offer advice. If I were you, I would indeed see a cardiologist. If you have copies of any tests like the EKG from the ER, take them with you and explain everything that you wrote here.
Some medications, some other issues like anxiety and several other things can cause pains, twinges or discomfort in the chest and the only way to find out what's going on is to see a specialist. I think this is the only way you will be able to feel assured about your health. You have already been to the ER so your insurance has that on record.
I hope you're doing ok tonight.
"The Happy Bunny"
diabetes type 2 controlled by diet and exercise and
very low carb way of eating