MD- so I think you should try reframing your thoughts. I do not know how you feel but from what you have written it seems you have a bleak look on somethings. Rather than focusing on WHEN you started transitioning..can you stay mindful of your thoughts in that in this moment you have transitioned? Rather than staying stuck sorta on the dates of it....try focusing on the facts. check the facts. What are the facts?
1-you are your true gender now
2-your mom accepts and supports you greatly (this is huge, BTW. Really tap into some thankfulness mindsets with this one.)
3-you can even go to a T. One time I was severly suicidal and couldnt get help because I had no insurance and couldnt afford the $20 sliding scale fee to see a T.
4-ypu have meds that help you function for the most part.
5-you get to go places and do things. some people are stuck at home.

what else can you think of? check the facts.