How do you cope

I was recently diagnosed with breast cancer in December. By the time I had scans, bloodwork and biopsies, I learned it was stage 3 triple negative and it was curable. I knew it would be a fight, but I was all in. Scary as ever, but still a good chance at life after. After a PET scan that afternoon, I was told it had already spread to my bones and I have Mets on my pelvis, spine, ribs and upper right arm. I’m now stage 4. I’ve learned it’s no longer curable and treatment is dismal due to the nature of the disease. Has anyone else gone through this? Do you have any advice for me, or anything positive because everything I’ve read online feels like its quick death sentence. I’m terrified and desperate to try anything to stay alive. I have a 13 year old who needs his mom. We’ve already lost his dad and I can’t bear the thought of him losing both of us while still so young. Any advice is appreciated ❤️