Sounds horrible. I would seriously consider bringing in a lawyer if you don't get any better help than this.
First, you need a diagnosis. Irregular heartbeats can be almost anything. Then you need treatment (ablation, medications, etc). To basically tell you to stop living your life and nothing else sounds so horrible that I almost don't have words..
There are still many doctors that have not kept up to date with the latest guidelines for treating or managing arrhythmia. I suggest seeing a electrophysiologist to get a more complete picture of what you have and what available options are.