I’m so sorry to hear what you’re going through, it sounds brutal. I understand the urge you have to contemplate suicide but I also have to advise, if you can, to resist said urge and hold out as long as you can. I know it’s much easier said than done, but promising research is (subject to funding) hopefully around the corner and if we get that going then things will look more positive than they ever have.
You also don’t know how your current state will change. It’s perfectly possible that in the coming months/years your most severe symptoms will start to alleviate somewhat and make life more liveable. I certainly hope that’s the case, anyway. Wishing you strength man.