AIO I have cancer and my sister decided to kick me out after promising me a place to live while I did treatment

This was a few days ago now and I've had time to process a bit, but I still feel such an intense sense of betrayal and deep anger.. like I feel so fucking pissed. My own fucking sister would do this, after all I've done for her over the years, dealing with her getting rehab, taking care of her kids for literal months to the point they cried when they left my house, a shoulder for her to cry on when she was leaving her husband.. like the fuck, I've been sick for almost 16 months, I've been showing positive results from the chemo and treatment and I seriously don't understand her reasoning for forcing me to live in My car when she spent weeks planning for me to sell my house to help with the insane treatment coats, and live in her spare bedroom while I underwent the exhaustive treatment regiment I'm going through and STILL AM going through. The fucking kicker, a decent part of the money from the house sale was kept in her HYS account to help her build interest as a convoluted form of rent payment, which was her idea… guess what? She hasn't returned that.

I feel like the biggest fool on earth. I'm an absolute moron for trusting my sister. This hit me harder than the diagnosis itself