Reading your post is heart-breaking, you’ve got so much to deal with, let a lone having to look after another person. It is a lot for anyone to have to deal with.
I work for a charitable organisation which provides help with a ‘friend’ and are extremely easy to talk to, if you still need it. You can simply register on the website http://www.icarustrust.co.uk/contact/ or email us at help@icarustrust.org.
I really hope things start to pick up for you very soon! We wish you the best of luck.