Yes a stress test would be a good idea. I just had one and it was also abnormal. So I had the cardiac catherization and only had a 20% blockage so doctor says to do nothing. I was so worried out of my mind because I have a family history of heart disease. So go ahead and find out now. Go where ever you can afford to go. I had no insurance when I lost my job due to another disability and got good treatment. Do not believe the old wives tales when you can't afford insurance these are doctors and nurses and they are such because they care. They could probably work some where else but stay where they are because they want to help