Not to defend that doctor's office staff, but, nowadays, most doctors' offices are staffed by high school grads with a few months training, called medical assistants. They are not nurses, nor are they trained even like a nurses' assistant (AKA, nurses' aide).
Consider calling American Cancer Society. They often have people that can talk to you, or that are more networked with others in the field. They may even sponsor support groups in your area.
Another great resource is the registered nurse who is administering any chemotherapy, or the radiation technologist who sets up the initial radiation markings, etc. These people should be able to direct you to some other 'expert' who can help you find support groups, education, etc. Often, a social worker is assigned to 'cover' the department, and, again, they should be able to help you.
Don't be afraid to ask, "What would you do if you were in my situation?" I've gotten some tremendous ideas when I picked the brain of someone else. Networking really helps in this area of life, just like in getting jobs.
And if you know any nurse, especially those with a master's degree or doctorate, call them. They have the ability to get to the source of your problem and point you in the direction of help, often with only a few minutes discussion. (And, remember, they WANT to help!)