Having heart fears. Having symptoms like heart problem. Been tested a year ago, doc says I'm fine. BP/HR fine. Eating healthy. How do I get over this?

Treat symptom cause. It sounds like you've been assessed and found to have a healthy heart but other problems can cause similar symptoms. You don't say what your symptoms are but your reflux can cause esophageal spasm which can cause chest pain identical to heart disease. Chest pain can also be caused by musculoskeletal problems. If you can address the cause and eliminate the symptoms then you won't have to worry. .
Anxiety? Your symptoms are suggesting anxiety/ panic disorder. Talk to your doctor at next visit about your fears.