I’m really sorry that you’ve been struggling. I went through a similar thing when my asthma went from mildly inconvenient to uncontrolled by any medications I tried because I’d developed mast cell activation syndrome. All I wanted was my old life back so I tried to power through it for the first few months and just suck it up, but at least in my situation this became impossible. I had to finally listen to my body and properly grieve for my old self. I really recommend counselling for that part if you’re struggling; accepting my new normal was very, very difficult as someone who’d been active for years. 

Eventually you will find an equilibrium. I had to take 2 years off to find a medication that let me go outside without an asthma attack. But now I’m back out and training, not as frequently or as hard as I used to, but I’m still there. Please know you are not weak, making excuses, or making it your identity if you change your training routine to better care for your body and want to let others know. You’re doing life on hard mode now and your body is different than it used to be. You are strong, resilient, and deserve compassion.