Actually what I asked for originally was if anyone knew how the hospital system works and if my T would be informed if I did OD.
Most likely not, unless you have a psychiatrist also and you've given coordination of care permissions between the two of them.
Your words seem to be expressing your pain here decently enough. I would strongly suggest showing your T this thread.
And no - you aren't going to find support on this board for that kind of acting out.
Not because no-one cares; actually, because people do care.
You are having intense attachment problems, and your therapist is the figure you are trying to grab hold of. Fantasizing about how your T will finally see your pain and give you the attention you crave, is not going to help you feel better or move past this.
Do you like your liver? Are you glad you are not on dialysis? I'm going to think, yes. Right there is a very good reason to not f*ck around with pills. I'm serious. Also, if you'd like to keep all your limbs - probably better to just put this whole idea away.
If you are having trouble keeping yourself safe, you need to get to a hospital.
I know you've said you are not planning to act; but you've also gotten some push-back here. How are you feeling?