Well, I plan to go to a hotel. That's something to consider, if it's possible for you to take a taxi(or Uber, or Lyft, which I plan to use). I know you said you can't leave home though, so I guess I just mentioned this in case you were to find a way.
Likes others have said, cutting isn't usually a good way to go. It hurts badly and is likely to fail, perhaps even with nerve damage. I don't want that for you, or the gory of blood to be the last thing you see, then your mother would see it. It's your choice of course, but a bloody mess would be traumatic for your mom. Sn is possible at home too. I'd imagine it'd draw less attention than cutting, but you do need time for it to work. Many people die within a couple hours, but stans guide says up to 4.
Op, I'm really sorry for your pain. It is horrible to go through this. Just please be sure that you truly want to attempt, before you do.
I sincerely wish you the best.