Brianna,
Suicide is a permanent solution to a temporary problem.
Please remember that. I, too and many others I'm sure, have been in a similar situation. The throes of depression, PMDD and suicidal tendencies... I have once walked down that path of darkness, my own demon gently holding my hand and seducing me with whispers that I would be better off dead, that the pain would go away if I took my life. According to the demon, I had no future to continue living this way.
You were happy once, you expressed your excitement (and fears) when you were reaching your HRT appointment. This darkness shall not follow you for the rest of you life. If you dwell and linger within it like people linger within the past rather than the present, then yes, your darkness shall follow you to the ends of the Earth.
Your darkness is not the enemy, it can be a useful tool to see things from a different perspective. You can turn the enemy into a life-long friend.
My darkness reminds me of the time where I was so depressed, getting out of bed every morning was difficult. I would lay at night and cry myself to sleep because I was drifting through the motions everyday, numb and distant to others. The darkness is now my friend, I may argue with them, feel their tethers gently brushing my shoulders and their occasional whispers, it does not hold the power over me it did those many years ago.
All we can do is offer support, advice and lend a shoulder for you to cry on through this difficult time. While things may look bleak now, this moment shall pass.
The rest is up to you and the help of your therapist. You say you are done with talking but here you are, speaking on forums of your troubles. I feel you have much more to say but cannot for some reason. You have not specified what is causing the depression, be it struggling identity-wise and/or suppressing your true self, only you know your truth deep within you. A therapist can help with both of those things and many more.
Suffering in silence is
not the answer. I will not allow the community to lose another individual to become another number, another statistic.
You are loved and supported. You are not alone. You are
never alone in this world, dear.
I have decision to make as well and am currently grappling with, such as how to come out to the wonderful family here at Susan's.
As others have echoed, what decision will you be making?
Kind regards and hugs,

Jacey