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Well, you indeed have gone through a lot in the previous year , but also you have endured all this like a true fighter. Being an expert in mental health i can only help you with your problem with sleep and Depression , as for the other pain related symptoms you should consult some expert in the health category of Just Answer.
Now, directly coming to your problem of difficulty in sleeping
. I would suggest that instead of using Seroquel ( quetiapine), which is an Anti psychotic drug , and agreed it is at times used for inducing sleep, But, i would suggest you either take Ambien CR which is worldwide known for treatment of insomnia
, and besides this , it also allays anxiety
OR you take Trazadone 50mg ,which is anti depressant drug ,so it will help you in depression as well it has a good sedative
/ sleep inducing effect. Both these drugs are to be taken at night , and you shall discuss them with your doctor and start on any one of them , right away. As for seroquel , i would not recommend its use , as being an anti psychotic , its primary use is in treatment of Psychotic disorder, plus it has its on set of side effects and withdrawl symptoms as well , when withdrawn.
So, i advice you to discuss the above mentioned treatment regime with your doctor and wish you get well soon.
I hope my answer serves your query according to your satisfaction.