How satisfied are you?

As to how satisfied I am, I have never regretted my path. I started out aiming to study medicine, got hooked on computers and computer engineering, took a lot of classes in many different areas and generally enjoyed all of it. I've found a tremendous overlap between various fields. It's estimated that over half of innovations are ideas carried from other fields and adapted to a new problem. I myself got one of my first inventions from adapting a principle of neuroscience in a book I happened to be reading to computer networks.

Specifically for your case, I'd never shy away from technical subjects in particular. To get into medicine, you should study the expected math, physics and chemistry and biology classes. I would definitely consider engineering classes. No one should ever expect to be able to ignore computer science, since it becomes part of every field, and it helps to know what makes them tick. Like it or not, business is always part of medicine and what allows it to stay afloat. Knowing business principles never hurts. Finally, my own opinion is that a doctor should be a well-rounded person, so some art and language classes would be great.

A great side benefit to all this is that it exposes you to your choices and you're more likely to make the best one possible. It did with me, and I've always felt very fortunate for that.

The definition of satisfaction is different for everyone. It is natural to encounter difficulties and experience hesitations achieving anything meaningful in life. However, that is the beauty of the joy and satisfaction you will get after going through ups and downs. I would suggest to be positive and seek for advice when you need in the journey of your careers.