I get SSDI. I know how little those checks are, and I can understand why you are so upset

Do you think that if your relatives realized how little money you are living on, and that you have other expenses (especially the medical expenses), they would have a change of heart? Are you comfortable divulging that info to them?
Of course Gerry is right… they may not be aware how things like this effect you either

I'm sorry you have this huge worry after having so many good days

I hope that your case manager can help you, and there's a positive resolution to this problem. In the meantime, I will say some good words for you