Heart attack or panic?

Hello. This is my first time here I came across this forum in my desperation. I have suffered from anxiety/depression for over 15 years. I tried to cut back on my celexa and big mistake.
Coming up on the one year anniversary of my dad's sudden death by heart attack. Now I have convinced myself that I am having a heart attack. Chest pains, etc. so freaked out I scheduled an appointment with my cardiologist for a stress test next Monday. Now afraid I'll die before then. Can't work ( I am a teacher) or take care of my kids.
Upped my celexa back to 20 on Sunday so just waiting for it to kick in too.

By having your heart checked it will give you peace of mind,
a high percentage of us feel like something is wrong with our
heart during a panic attack, just know that I don't know anyone
that actually has a heart problem but me, "I am 71 so don't go
there" I have been through it all and the real heart pain is not
even close to the anxiety and panic symptoms we get. Peace

Larry ***