I thought it would last longer

I'm a 36 yr old mom of 3 young kids, diagnosed March 2023 de novo Her2+ breast cancer with numerous mets in my spine. I did 5 rounds of radiation followed by 6 rounds of taxotere/herceptin/perjeta and then maintenance HP... until now. I have been NEAD since I began my treatment... But ever since mid December I was having weird leg pain. After several weeks of back and forth with my oncologist, she finally let me get an mri of my hip and femur. Side note, I get PetCT scans every 12 weeks but apparently it stops mid thigh..? Sure enough, my cancer spread to my femur and hip. I think it's still just in bone, but I am crushed. I have been NEAD for almost f+ck*n 2 years! I thought I would be on h/p for so much longer. I felt completely normal. I was maybe a little tired but I feel fine. I don't know exactly what will be the new plan until I see radiology on Monday... All I can think about is that this line only lasted a little under 2 years, so my next treatment will last even shorter and shorter and soforth. I should be gone by the end of the year. That's it. I keep spiraling ugh. This sucks.