My husband diagnosed with rectal cancer. Waiting for treatment was a dreadfully stressful time. We felt very much alone. My heart goes out to you. All I can say is keep checking why there is a wait to be seen. It may be they are waiting for test results etc to decide what treatment is best for you. Keep asking why you're waiting if youre not been told. Also as hard as it is, try and keep doing the things you like every day. Ask your GP if there is anything you could take to help sleep. Also free app "Impact Timer" useful as has sleep stories which can help you relax and maybe sleep. Hope you get sorted soon.