Squeak,
Glad to hear you are better.
Perhaps you can look into a county hospital
near you that will not be that expensive.
You really should have a cardiologist look at
you.
I remember I use to have a heart rate monitor
I received as a gift, for physical fitness (increasing cardiovascular endurance). It was some kind of band that went under your arms around your chest, and had a wireless wristwatch that gave a heart rate readout.
Perhaps you can get something like that to
keep a watch on your heartrate.