I used to do the same thing, when I was first treated. I didn't know any better, just figured he;s the doctor, must know what I need. That was 24 years ago, these days I am XXX on wheels when dealing with them. If they say something I don't understand, we don't move on to something else until I get answers. If I have questions, they get answered, I don't care how much of a hurry they look like they are in. I sat in the waiting room for an hour, then another hour in the exam room, they come in in a flash and are in and out in 4 minutes. I am going to get my time's worth.
If you don't want to change yet, or don't know, go back, and ask questions. Don't get intimidated by the attitude, or the rush. Ask the question, look them in the eye and wait for the answer. Then next question, don't let him leave until you get answers. I wouldnt be put on a timeline to give an answer or a decision on something so important, if your not comfortable with the situation, tell him your going to get a second opinion since it is such an important life altering decision.
Hope you get peace with the answers!