Welcome to the site.
I am sorry to learn about your condition and I empathize with you.
Well valerian root is a herbal medicine which has found effective usage in insomnia
and anxiety. It is a relatively safe drug and being a herb it has much less side effects as compared proper medicines. So it is a good ploy to counter both insomnia and depression at the same time with this herbal drug which can be taken in the dose of 400-900 mg /day taken 1-2 hrs before bedtime for a period of 28 days.
If this also does not relieve your conditions then you may try either trazodone
at dose of 50 mg before bedtime or seroquel
at dose of 25-75 mg before bedtime, this shall most likely relieve your insomnia and depression.
Kindly discuss this with your doctor.
I hope this helps.
Wish you a speedy recovery.