I need advice…

Hello all… I’m new here. I have anxiety and have had anxiety for about 10 years now. I’m currently experiencing one of the worst attacks of my life, and it is not irrational. My partner has DID and has forgotten everything about themselves. Everything, including family, name, age, where they live, who they live with, where I live, who I am, who their friends are, etcetera. I’m so very worried that they will not be able to come back… and it’s nearly crippling. I do not know how to help them and I am not sure if I’m over sharing and I just want them to be okay… I want them to be able to remember again… not just me, but who they are as a person. I’m so scared…