You will see other threads on this forum where many of us have these attacks triggered by indigestion. There is help for it, but I know how frightening it is.
I would call your doctor's office today and tell them about the heart racing, chest pressure, dizziness, and trouble sleeping the last 3 nights. They can direct you from there. Good luck.
Also, I have difficulty going to sleep so the last three nights I have taken a shot of Tequila. I am worry that this may affect my health further, but I need to sleep. Please help!