Have you tried the Citizens Advice Bureau, they will be able to tell you what your options are for housing and health, they will also have lists of contacts for support groups in your area. Have you been to a GP about your health problem, if not you should be able to get an appointment sooner than December (it is usually about a week for a GP appointment in the UK). If your GP has already referred you to a specialist then December is within the 18 week limit for an appointment (this only applies for physical health, there are no minimum standards for mental health ). However, if you are waiting for a specialist appointment and are still having problems then go back to you GP or call NHS 111 who can advise you whether you need to go to A&E.

Hope this advice helps with the more practical of the problems, I'm sorry you've had such a traumatic life and I hope being in the UK finally helps you find some peace.