And, please don't!
The doctor was right and i hope you are okay.
I also realized that it was possible that you were asking the question in order to plan for a way to end your life.
I hope this is not true, but if it was....
Not all overdoses go as planned. It could be that you harm yourself very badly, but do not die. This could make your life much worse and harder than it is now. Please find support and care!