Dear Rosebay, so sorry for your loss. I came across this page for rather obscure reasons, but decided to sign up so I could mention a couple of references that I found useful while coping with my mother's passing in 2015 (she had Alzheimer's), and my father's passing almost a year ago. Now I help care for my step-Dad who has dementia. As a new account user I cannot post links, but if you search in the usual way you should be able to find the relevant pages (or an established user here could search and post the links for you).
The first is a page on the web site of the British Psychological Society, titled, "Coping with Bereavement".
The second is a page on the main NHS UK site, also called, "Coping with Bereavement".
My family and I found these documents very informative, especially in understanding the range of reactions that are perfectly normal. Naturally, the articles cover many of the same issues, but have a different focus (I recommend reading the BPS article first). Both have additional suggestions for those needing futher information, support and advice.
My step-Dad and mother were married for over 25 years. With hindsight, my main conclusion is that, when a husband or wife passes away, there is a degree to which social and care services perhaps understandably focus more on the immediate physical medical needs (if any) of the remaining partner, as opposed to emotional or psychological factors. Perhaps there is an assumption that an older person is more experienced in life and thus ought to just be able to handle things better, but such an assumption is often in error. If a parent loses a child, there is significant proactive emotional support available, but the situation is very different for an elderly person who loses a partner.
Thus, I am glad you have the support of your family and others here at this time, and your comments have helped me to understand better what my step-Dad has been going through, so it is a very good thing that forums such as this exist.
Best wishes.