Unhappy with my current treatment, how do I tell my doctor? I know the treatment is what is best, but I am scared.

Be honest!!!! Be honest and straightforward. Your physician should not take offense, but should help you understand what your options are and why the treatment recommended is what they consider the best. They may actually be surprised that you are not in agreement with the suggested treatment. If your physician doesn't want to hear your concerns, it's time to find a new physician!