Friend,
I think you need to see your social worker ASAP regarding the housing situation so you can get some information about the housing options out there. The more information you have, the less you will worry...
Like Kiwi, I am very worried about the length of time between nephrologist appointments. It seems to me that you should be receiving some kind of treatment
NOW.
I think it's a good idea to book an appointment with your PCP. Maybe he can explain your condition better, and explain why you are not receiving any treatment at this time. He may not even be aware of the situation.
Please don't worry about hurting anyone else's feelings right now... you have a right to be angry about being sick, and a right to be angry at your brother in law.
I think what he is doing is just cruel.
The news you got is a terrible blow at the worst time. My heart really goes out to you