You are undiagnosed and a student who has no money to live on. Perhaps start by enquiring at your college about what payments there are for students, etc. The UK has standard unemployment benefits and the like. From what is in the media here about UK changes they are not cutting them just making them harder to get, making people who do get unemployment benefits, do some sort of training or voluntary work or the like, they are looking at using the Australian model. If you have insufficent income there will be some form of payment if you are a citizen of the country you are in, it is not just about being disabled. People are not disabled can still need money to live on. Here it is referred to as mutual obligation, if you get money you are expected to make a realy effort to find a job, improve your chances of finding and job and giving back to the community if possible. This means that many of them are required to do voluntary work or training or the like, to improve their chances of finding work, make them more employable, etc.
I'm not saying I agree with any of this, just stating what the theory and policy is here, and from what we are hearing here what is being pushed for in the UK. They will be asking people with disabilities to find appropriate work, as opposed to any work that the unemployed are asked to find, etc. The disabled are also usually only asked to find part time work, do part time activities and the like.