Somewhat similar situation:
29 now. Was 27, "biglaw" attorney, very dialed-in. Come from Bum-F Nowhere, USA. Went to State U, Ivy League law school (highest ranked school in the country). Doing well with training/lifting, was considering a BB competition in the coming year or year and a half. Squatting in the mid-400s for reps. Just dialed-in. If I were to characterize myself in one adjective, it would be "dialed-in."
Wake up one morning last year, extremely distended abdomen, intense pain. It was 2:15am, I'd been up to midnight working on a deal. Never been to the ER in my life. Knew I needed to go.
In hospital for three weeks, almost entire colon removed. Contracted C.Diff during. Thought I knew what pain was before: it was absolute hell. If someone had put a pistol by my hospital bed, I honest to God would have ended it. Still today, if I had to repeat the experience, I would just end it.
Couldn't return to work for another three months. End up having a massive infection. Surgeries for the next six months. Unofficially lost my position in the firm. They're letting me stick around but have made it clear that I need to be looking elsewhere (which I am).
Physically, I was broken. Went from a 195lbs athlete to a 145lb man who could not walk up stairs without being winded. The bed rest, along with the fact that I was already on TRT and was not receiving medication for the three weeks I was in the hospital, made everything tank pretty quickly. Then came the infection. Imagine trying to rehab physically, getting off the elliptical you're pathetically mulling, pressing on your stomach (where there's a tube) only to have a massive mix of blood and puss come out. That was the daily normal.
I was basically done with surgeries at the end of last calendar year. This calendar year has basically been a "lost year" for me. I spent the first several months in various stages of depressed: trying to get back into working (only to find that I had been essentially replaced), diet to hell (was super strict eater beforehand, which apparently did me a whole hell of a lot of good as my GI system was left in a complete shambles.....), sort of marking time at this point.
I don't even know what substantive advice I would give you other than that it is hard. I look at some positives: my family was there for me throughout in a way that I don't know that I'd have even imagined. My father and I had a pretty distant relationship, but one night when I was readmitted, he drove four hours to stay with me in the hospital, and he literally wiped my ass for me in the bed as I tried to struggle to wipe my own and missed some spots after a bedpan use.
Gave me my first chance to take a step back and do a real "life eval." I've never been one to sit and stare into space--have always just been "going." In the hospital, I was in enough pain that I could not concentrate to read, and I was left largely to stare at a wall for weeks. When you're in that situation, it forces you to take the time to think about where you are. As I face losing my job now, having that time to reflect made me realize that the job I have doesn't really gel with what my life priorities should be anyway. So facing the future isn't too scary now.
I'm now a "lesser, suckier" version of who I was a year and a half ago, and in many respects I always will be moving forward. But I'm also a different type of person. I take days where I sit around and do nothing. I do things "average Joes" do that I never did before. I couldn't read and do work, so I started watching television, movies, etc. Ate junk food. Not always in a healthy way--sometimes in a depressed way--but hey I've been depressed, what can I say. But for better or for worse, this is where I'm at, and I've at least accepted it and moved on from what's happened at this point. So now I can face a future that I formerly looked at with horror and at least think it's something I can endure and maybe even enjoy. And things like training and such are coming back: sure, I suck compared to old-me, but I'm not a slouch either, and I'm just doing the best I can. We're all just doing the best we can.
This is all just a lot of "off the top of my head riffing," but I hope that some of it may resonate with you, and I am sorry to hear about this having happened. There is nothing more devastating than being a young person like we are and having our bodies quit on us.