First of all, how are you feeling? Sounds like a completely unexpected event.

The most important thing is to take medications and follow a diet. I saw the article that cardiac rehabilitation may be in your future. I did a 12 week program and it was helpful. Most importantly, they will monitor you while you exercise to make sure you are ok. They eventually clear you for further exercise.

My best advice is to follow the recommendations. Also, feel free to talk about your experience. Even online or with your physician. Specifically, how are you feeling. It's important that you take a holistic approach to this.