Hi Nuala. I'm sorry to say that I have barely had a decent night's sleep since my diagnosis just over a year ago. Sometimes when sleep is really eluding me I use the Headspace app which has some handy sleep aids on it.
My chemo put me into menopause so now it's hot flushes that wake me up 2 - 5 times a night. I've got used to going back to sleep quickly most nights, but unbroken sleep is gone forever now. However, there are people on this site who have achieved it, so don't give up hope!
Do all the things that the experts say, and they should help. All the best, K xox