First of all a huge
You must have a huge gap - do you have support, due to all the distancing during lockdown? CRUSE will listen - many areas have waiting lists so do contact your local group when you feel ready. Run by the bereaved, 4 the bereaved.
Your GP is a little behind with advice, most ladies keep taking HRT for years after 60. MayB ask for a referral to a menopause clinic for further advice? Not a gynaecologist, because they don't know much more than many GPs seem to do.
Some find that keeping a mood/food/symptom diary of use, it gives a sense of control and charts progress.
Hair loss has no rhyme or reason - have you looked at the Alopecia UK support group? Matt Lucas is on the 1 Show right now and has been contacting children - he lost his hair at age 6. It may be a combination of your husband's death and hormones ....... would you be up for wearing a well made wig?
Let us know how you get on.