Insomnia ..... stage 4

HI Folks ,
after trying Herbal Remedies , Melatonin , Diet and Zolpidem sleeping tablets plus attending NHS Sleep Clinic I have actually made some progress with my Insomnia . Basically my C. is Stage 4 and spread in 2015 to my Lymph nodes in Groin and Chest . In March 2015 I started on Bicultamide 150mg Hormone Treatment and Radiotherapy. In April I had my first subcuteneous Zoladex pellet for slow release over 3 months . Prior to this my sleep , apart from Bladder waking was deep and normal. No sooner than I had the Zoladex Injection , after 48hrs my Insomnia was full blown . I came off all therapies and treatments in Mid 2016 to try and establish a base line. At this point I was going nuts . Gradually my sleep improved and I was getting anywhere from 3 to 5 hours but it was very sporadic and not my natural sleep pattern . Still better than Insomnia . Then I had huge pain in my Lumbar region in Jan 2017 . The C. had spread to my spine . Predominately L3 to L5 but all up my spine. Back on Bicultamide 150mg and in April 2017 back on Zoladex. Insomnia straight back to square 1 and not only that the Menopausal symptoms of Hot Flushes , running constantly too hot , Very Low Drive ( Hormone treatment is to reduce testosterone to zero ) . I know without a shadow of a doubt , my Insomnia is not due to stress , My Mind or habits ... although all can play a part. It is because of the Zoladex and when I lie down I cannot get into sleep , even with sleeping tablets Zolpidem 10mg as my head goes through constant heat cycles . I run down to exhaustion and then I can only nap for a max of 2hour cycles . I went back to my Onco and I have gone back to Bicultamide for the C. but I am left with the Intractable Insomnia. I am currently seeing my Ayurvedic Lady who helped me so much in 2016 . We are looking at the Hormonal perspective , Zoladex side effects etc . I am also seeing an Acupuncture lady at my local C. support centre , still applying Sleep Hygiene ( 6am to 10pm ) , herbal support , melatonin , diet etc

any help would be greatly appreciated as Insomnia and Fatigue are my greatest impacts

Thank you Kevin - B'ham UK