Hi, Muffy
when my husband was facing treatment, my main worry was that I would get sick, and not be able to drive him to his appointments when driving himself got problematic. I sent out an e-mail to friends and relations summarizing the situation and was amazed at the response I got.
Think for a minute - if a friend contacted you asking for help with driving or shopping - you would help if you could, right? If you begin to set up your support network with the resources Christine mentioned, and with reaching out to friends and family you will be in a much better place medically and emotionally. Remember, the key to getting through the treatment in good order is nutrition, hydration, and not getting in a car accident by driving when you should not! Your changes for a cure are improved by completing your treatment as scheduled.
As others have said, there is no need to share the exact source of your cancer.
Maria