I agree that this is a decision you should be able to make. I haven't considered it for myself, since it's not legal in my state, and if someone I was close to did it, I imagine I'd be upset. I'm also imagining a lot of paperwork and bureaucracy.

Have you looked into palliative care and/or hospice? My uncle was in hospice for less than 24 hrs, but my aunt asked people to make contributions in his memory to the hospice. It made me wonder if they were providing a service that wasn't technically legal.

It's also possible that Enhertu will have minimal side effects for you and will make you feel better.