[wee2er]

DiDi,  might be able to initiate the conversation with, "I haven't been on my  game lately and have been seeing a therapist.  It seems I have "gender dysphoria"."  The rest of the conversation is on how much better you feel as  a person now.
Just a suggestion.

Cat

thanks for the advice. I think its the best that I state things clearly and stand my ground instead... I have a feeling that about my mother, I need to show some toughness and strong will right there or she might not take it too well. I drafted a letter for her btw.

I think you are right, but I would do it face too face not via letter as that might be seen as weak. Stand up like a man (err, woman, well you know what I mean) be straight and strong with her, say it with pride and show her how happy you are now. Good luck.