Can I just ask what do you mean when you say that you are almost completely unfunctional? Are you getting up at a reasonable time each day, showering, eating, drinking and taking meds? If you are not able to carry out these daily basics then you need to go back to your gp and explain your situation to them. In the past what has worried me most is that people would think that I had a bad body smell so I would shower a few times a day to ensure I was clean. What helped me in the past was talking therapies and taking my meds on a regular basis. You really need to start with your GP though. It helps to get into the system so to speak, and you will be able to access a lot of therapies from here.