What should I do to take care of all these issues Im having before I have a nervous breakdown?

Ok I need help.. Here is the long list of details…
My Aunt has cancer, I am loosing my last friend because his girlfriend lies to him about me calling her a slut (which I dont) so he says I complain too much, she has threatened to rip my face off if she hears me say anything again and now she is hearing someone tell her I am saying stuff, I haven’t been very healthy lately my mom thinkg due to stress from all this… And I used to be friends with his gfs friend but she wont talk to me anymore for some reason unknown to me. (but really I dont even want to talk to her anymore), and me and my mom are having relationship issues.
What do you suggest I do to fix some if not all of these issues? Even if you could help me solve one or two of these issues it would be greatly appreciated.