Breastman, I understand completely. Your story though unique and individual to you bares the same hallmarks of those of many others. You sound like you have a strong GID, and my guess is that you know this. You have been visiting this site longer than I have (and I am one of the oldest active members now...lol), so I am sure you have seen your circumstances reflected on these boards before.
You say you came out to your wife as gay. Is your marriage still intact or are you separated? Is your sexuality acted on or hypothetical?
Regardless, my guess is that your low T level (quite common in later life for bio males) led you into a stronger recognition of your GID, which again is not uncommon.
If you have had these femme desires your entire life they are not going to go away and are likely only to increase.
I cannot tell you what to do, my friend, but the sanest thing for any of us is to accept and nurture what we are.
If you want advice, feel free to pm me and I will be happy to help.
You are not alone, honey, and many of us have been there.
Hugs
Sammie