Firstly, without being trivial, your feelings are entirely normal.
You have been through extreme life changes - lost your job, your partner, your home; you are stressed about the ongoing court case; you are dealing with the emotional aftermath of the accident.
I would be very surprised if you weren't feeling the way you do.
Contact Supportline - they may be able to help you
http://www.supportline.org.uk/
You need to believe that this very low period will pass and things will improve for you.