Make a list of questions you may want to ask. If you don't understand something about your treatment - ask. You may like to take a close friend or relative to the appointment with you. If you are feeling upset, they may be able to remember details of the consultation which you might have forgotten. You may also want them to ask some of the questions you yourself might be hesitant of putting to the doctor.
Some people are afraid of the hospital itself.
You may find the doctors can't answer your questions fully, or that their answers may sound vague. Doctors know from past experience approximately how many people will benefit from a certain treatment, but it is impossible to predict the future for a particular person. Many people find this uncertainty hard to live with. Uncertainty about the future can cause a lot of tension, but fears are often worse than the reality. Gaining some knowledge about your illness can be reassuring.