Understandably its challenging Newbie, but try to stay calm and composed as outlook is everything with cancer management. In NHS there is 2 week protocol with cancer treatment, so everything should move at that pace . Perhaps try and chase your GP surgery for that (not ideal but needed) . My 19 years old son got diagnosed with papillary type earlier this year but we were getting appointments with 2 weeks window period, USG, FNA then TT and B/L neck dissection. He is recovering well now and waiting for RI therapy. His surgeon was very reassuring and kept on saying that thyroid cancer is a friendly one (  don't know how true is that but something to rely on) . she also said these days we have moved on with cancer treatment so there are lots of options for all types . stay composed but keep pushing . Hope it goes well for you.