I have lost everything and everyone in my life

 A little background. I have 4 children and 4 grandchildren. I have had the same job for 13 years. I got diagnosed with a dvt in August after being misdiagnosed and treated like I was only looking for pain meds. I went from working and being active to not being able to walk in a span of 6 weeks. In the time since my kids. 3 adult and 1 teenaged have stopped talking to me. I have lost my job and I have been living off my savings which is running out. I just feel like what's the point of living anymore? I still can't work and after 13 years of loyalty I got kicked to the curb. My adult kids basically stopped caring when I couldn't babysit or let them borrow money anymore. And my teenager went to live with his dad because I didn't have extra money to give him constantly. They all could really care less. I feel so alone and helpless and just not worth anything.