32 old female, w/anxiety & panic attacks. Any suggestions on how to stop believing my panic attacks are cardiac events? Hate living in constant fear.

Step 1 & step 2. Step 1--see a cardiologist to confirm absence of cardiac issues. If none are found--step 2. See a psychiatrist why you are so phobic or fixated on your emotional state.
See below. Would describe this to your treating psychiatrist and primary care doc. The worry that one might have a panic attack is a common feature of panic disorder. See if the following fits your symptoms. Adjusting your treatment might help. http://www.ncbi.nlm.nih.gov/pubmedhealth/pmh0001922/.