falling apart, stage 4/ aggressive treatment radiation and chemo for 6 weeks

Hello, we went to our first appointment yesterday at the cancer center.  The cancer started in his tonsil, than spread to his throat, tongue, and a lymp knod, He has been seeing his primary doctor off and on with complaints of sore throat and ear pain, between dr. Cancelling his appointments, seeing different ones in his office due to his dr. Didnt have an opening, his dr knew hes on strong pain meds due to nerve damage stemming from a failed back surgery, isnt a primary doctor suppose to take everything a patient is on and health issues into account, in referring a patient to see a specialist, I finally was so scared, as I looked down his throat with just a flash light, and didnt like what I saw.  And his primary dr. Didnt see this??  So I went with him and he saw another dr. In the same office as his dr is in... first thing I said, my husband needs a referral here, this has been going on for months, keep giving him a z pack, the lab comes back no strep, red flag here.  So this dr. Did refer him to see a ENT specialist.  We go in fast in 4 days, he did a biopse and did confirm my fears, he said he has tonsil cancer, did the biopse from his tonsil.  And in his knod, side of his neck.  He checked his vocal cords, they are good.  He made us an appt at the cancer center, radioligy.  We saw him yesterday.  Triple bad news.  He says the biopse from his tonsil came back cancer.  Ok we knew fhis, but this doctor said, it spread to his tongue, throat, and knod. How can one dr say one thing and this one another...im in shock here, very emotional here...waiting on if it caused by a virus, he said thats more treatable, dont understand this...treatment is 6 months of aggressive treatment radiation with chemo.  Anyone in this forum who is and going this. What is this prognoises sp? Im so scared for my  husband, please someone help me understand this, im scared....I need some info here,  please help me to understand.  Bettyannew