Browse round. Make notes.
Have a look at the treatment and alternative areas. Some ladies find that herbals etc. help until their hormones go haywire!
Quality of Life is important. Therefore HRT should not be dismissed. Your cousin's disease isn't likely to be taken into consideration. Which side fo the family is she, Mum or Dad? It may not be oestrogen dominant so will not be of relevance.
Your GP doesn't seem very clued up. ADs are OK as some can ease hot flushes. Some can ease anxiety.
As oestrogen levels drop so the body may become dry: skin, nostrils, deep in the ears, eyes, vagina - atrophy can be treated with HRT without there being a problem, I had breast disease and it was never a consideration not to have treatment. Muscles may become lax = aches and pains .......... it's not called The Change for nowt
What support are you getting with regards to your son's treatment? Is there a group in the Hospital or local to you? On-line Forum even?