Serious mental health chronic depression cptsd chronic anxiety totally catatonic

I’ve had breakdowns before and been in hospital. But it’s happened again and I’m totally catatonic this time can eat of sleep ir prepare food. Can’t go out . I’m terrified the whole time terrified. And terrified of the position I’m in in life . I’m 53 now but worked all my life . Living in housing association property on lcwra and pip UC. Can’t believe what’s happened to me . No support daily . Catatonic. With the mental health team . So so terrified of Dwp reviews and being found fit for work when I can barely breath. I can’t manage any of my paperwork. Feel suicidal can’t find another way out . 19 year old son lives with me what would happen to him?
What has happened to me everyday is hell in every moment. Feel like I wake in a nightmare. Any one else living like this or in this position? I’m in a trap help