What Causes Palpitation Of Heart Along With Indigestion And Abdominal Pain?

I ve had an anxiety disorder for a long time, managed through medication. Over the last 3 weeks I ve had CONSTANT severe anxiety & medication & all relaxation techniques don t relieve it, this has never happened before. Symptoms: Heart palpitations, indigestion, shaking, severe abdominal pain with diarrhea, chest pain that extents into my throat and back. I don t want to go to the ER unless absolutely necessary not just for a panic attack but I m becoming concerned with strong heart disease running in the family. I m 38.