Struggling with Chronic Pain and Limited Mobility

My spondyloarthropathy has caused mechanical degeneration of my discs. With the combination I’m finding it very hard to bend, sit just about anywhere for very long due to inflammation causing sciatica, stand for long (again, I think it’s the sciatica), walk any distance, or do much of anything when flaring due to pain. The other thing is since a lot of it is mechanical at this pint, it’s like I’m always flaring in my back. I’ve tried yoga for back pain, I’ve tried PT, I’m on biologics and MTX. I walk with either a cane or a rollator and walker depending on pain and energy levels. All this to say, what do I do?!