How do I cope with stage 4 colorectal cancer and non-healing wounds?

My crc diagnosis started stage 3 crc . I was misdiagnosed first as bleeding hemorrhoids for 8 months , ( 3 dr visits and urgent care) by Kaiser Permanente . Started symptoms July 2018 until March 2019 and finally recommended for colonoscopy then they found out I have stage 3 cancer . Had gone all the 3 treatments : radiation , chemo then surgery where started my bag . Unfortunately despite all the 3 treatments the cancer still there . So we get a second opinion from UCLA then started all the 3 treatments as well until I got another bag . All my waste products goes to these bags . So I’m all artificial in my waste products . Unfortunately my Pooh bag leaked and I have to go another surgery for creating another bag coz that Pooh bag was not working well . Now I have digestion issues where I am having high output waste issues . Absorption of foods is dysfunction . Then I’m losing wts even though I eat good . That’s my additional issues now . They put me in Palliative care and on treatments every 21 days for targeted chemo hers2 . I’m skinny but still feeling good and positive . But with pain due to my rectum non healing wound where the cancer started was a solid tumor . Idk I guess it can’t be removed . ? It worsen now that’s why I can’t hardly walk due to the rectal non healing wound . And another issue came up that there was a bony lesion in my groin area and they said it metastasized that’s why I feel pain there too. So I will be having a radiation treatments to that area by next week on top of my targeted chemo . I pray to God that I can still cope up with all the treatments that I will undergo . I’m a fighter , was an athletic before joining all the marathons , cycling, biking and so forth and living a healthy life but still got this awful cancer . 🙏Do you still I can still make it ? Do you know any treatments that can heal no healing wound due to rectal cancer ? I appreciate if you reply . Thanks 😊