I can't seem to sleep... as, I really can't sleep.
You are having age related insomnia.
Thanks for your question on Ask a doctor forum.
I can understand your concern.
Since your age is 73 years, you are mostly having age related insomnia.
You should take low dose newer benzodiazepine group of drug like escitalopram or lorazepam.
Since these are prescribed drugs, you need to consult psychiatrist for this.
Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.