Once this is done, everything is simple. If it could possibly help, you do it. If it could possibly hurt, you don't. It makes no difference how pleasant, how convenient or how comfortable. Get a qualified independent second opinion.
Cancer is an extremely complex disease.
Often there is only one chance to successfully simply you doubt or have less faith in your physician. It is your life and you are entitled to be certain. Realize that knowledge is your greatest asset. The more you know about your disease, the better you are able to be a team with your physicians and help yourself fight the cancer. In old days people were not told they had cancer.