I agree that it's risky in the psych ward. Since you have attempted before that's why they might be keeping you locked for so long. Unless someone else is doing that ...
Faking recovery would be a better way to do it so you have access to more options.
Usually I don't write these things but seeing your situation, I feel deeply saddened and just want to help you in some way.
I deeply apologize for breaching the rules of the forum and even our safety.
@RainAndSadness if this is not permitted, tell me.
This post might be deleted afterwards.
As far as I know, you're watched every time, every way in the ward. So it's difficult to do it.
You will need to improvise a rope with the bedsheet by twisting it firmly and using a slip knot or hanged man knot. The cloth does not slide so there's no way to do it comfortably and the possibility of failure is high.
You can try to moisturize the cloth with dirt and water. Or your meds.
You can also wrap the cloth around your neck like a scarf and attach the two ends of the sheet in the ceiling, somehow.
It's not good to say this but I need to say the truth for you. Be careful to not be caught. The increase in the medications will make you unable to try again and ECT can be even worse.
Also, be careful to not be stripped out of your phone because of this forum and suggestion.
Please. You have suffered too much already.
Be careful.