You are making life altering decisions. Don’t just go with one person’s advice. For any of these doctors you have every right to obtain a second opinion. You need to feel as comfortable as possible with the choices you make.
Gather the information you received from your doctor and then find yourself another one. Present your case the exact same way you did to the first doctor. More likely than not you will hear the same thing from both doctors if they are both of the same caliber. And that gives you confidence in your choice and your treatment plan. It is a good thing to do.
Most people don’t bother because it is too overwhelming and they don’t want to insult the first doctor they saw because they think it seems like they are doubting him. You aren’t doubting him. And a good doctor will encourage a second opinion because he is confident and sure of the treatment protocol he wants you to have.