I'm currently the opposite of physically healthy and frankly being brain dead sounds a lot more enticing than having to face this bullshit every day. Guess ill just jump
My point is that at least you are mentally capable of making the choice to end your life and carrying out a plan to do so. If you wind up mentally handicapped, you may lose the ability to do one or both. It doesn't mean that you are going to be unaware of your situation, just that you may not be able to do anything about it.
This is exactly why failing an attempt, depending on the method can be so terrible. It's also why most ss members will always encourage taking a step back, evaluating your options, and only proceeding when you're sure about you choice and plan.
I'm not suggesting you jump, just that impacts to the head can have very different consequences for different people, even under the same conditions. Please really evaluate what is the best path forward for you. I hope you're able to come up with a peaceful approach.