It sounds like you had gone dark, and then when you tried to reach out to her the response from her went quite poorly. I would use that as a hint not to back down from LRT this time.
I really don't understand how your M could have gone south in less than 4 months, your W may have some bigger issues going on than just needing some time and space to figure things out. Still, I think it would be best for you to remove yourself from the equation as much as possible so that she can recognize that the demons she's struggling with are internal and not external (IE, your fault).
