My mother age 47 had undergone uterus removal due to adenomyosis of uterus , after 3 Months of surgery she was facing anxiety issues insomnia and excessive negative thoughts , I took her to psychiatrist and she is on medicines for more than a month now , today she missed her appointment and her medicines were over and she was unable to sleep , why does this happen how long she had to be dependent on these medicines for sleep or anxiety , does this happen after any surgery or due to menopause or something what can be the cause of this. Apart from this she doesn't have any other symptoms