My doctor was/is the same way. He says there is nothing wrong with my heart, but since there is a lot of heart disease in my family, I can't beleive it is all anxiety.
I scheduled an appointment with one of the best Cardiologists around (I didn't need a referral). He took blood, ekg (abnormal), echo, stress test and echo again. Blood and echo came back as "beautiful" in his words. The abnormal EKG he said could have been a fluke due to misplacement or just my "typical", but since the other tests were fine, he deemed me as having a healthy heart.
From there I was ready to accept that it was anxiety. Until I went to the emergency room with classic heart attack symptoms....test all said it was not hear related. They took blood, EKG and chest exray.
Off to the gastro doc I go....I do a barium swalllow and it show I have relux back up way into my throat. I also need to get an endoscopy because the barium pill got stuck 4 times in my esophagus.
Can you go out on you own and get some tests? Check with the specialists and insurance company.
Even with all these tests, I still have a hard time accepting it's anxiety.
Be your own advocate.
Good luck to you