Sorry to hear that you have lost your car. I know it isn't the same as having your own car but have you checked to see if there is a community transport scheme in your area?
Jean Merrilees BSc MRCOT
You can read more of my posts at: https://community.scope.org.uk/categories/ask-an-occupational-therapist
Sorry to hear about your mum. Sounds like an incredibly stressful and upsetting situation for you.