I am really sorry about your neighbor. That must be difficult to deal with right now for you.

I've had an experience that is similar to yours - my world was just starting to get better and then I found out some really bad news. This was around 2 years ago.

Anyway, I don't know if you're comfortable doing so, but if you need the extra help and support from your therapist, maybe it is the right thing to do to reach out to her. You don't need to go through this alone.