Get help from your GP, they can advise firstly, they have a fair understanding of the system, do you get any benefits at all, because there are some im sure which link together, bit difficult to explain. Not suggesting this as your problem, but some people with mental health difficulties can get it too, it would depend on the nature, but physical difficulties can be getting up stairs, needing help with your personal care, have trouble going out. Sometimes takes more than one go at the forms, two maybe three, and as much information of the problems you have, whatever they are. Its a bit of a maze i admit, and some don't get it who should.