It's possible. I had no idea what rhabdo was or that I needed to take precautions until it happened to me. They say the lifespan of a daily meth user is roughly 10 years. I don't know if I believe that as i've met people who have been using for 10-20 years and are still alive and still working and everything, but they're not exactly healthy in the 'head' if you know what I mean. I can sort of see it though, as there's so much toxic shit that goes into making it, that one must think the risk of premature death must be a lot higher for meth addicts. I've been using myself for about 20 years, but my use has always been rather sporadic binges rather than an every day thing. I also was stupid and just kept going and consumed over a gram (probably more) in a total of 5 days with no sleeping or eating when this happened to me. I then chose to lay around and masturbate for most of those 5 days (crazy, I know lol) and I'm pretty sure it was all that strain on my muscles, dehydration and too high of a body temperature that contributed to it. I know better now, but any time I use, even when I drink shit tons of water, my urine still comes out a little dark (although it's never been that root beer color again).
I'd say if you're worried or still experiencing the pain in your kidney area, you could always go to a doctor and tell them you just haven't been feeling well and ask them to do complete bloodwork. This way they'll see if there's damage accumulating in your kidneys and if they find it soon enough, you can take the steps necessary to prevent yourself from going into kidney failure. Which might mean having to give up meth or working out or both.
Unfortunately as long as one consumes meth (in any shape or form) they will be at risk to many things. If you're a bodybuilder/weight lifter and like to work out and use, your risk of possible rhabdo will be higher, along with probably a lot of cardiac strain. Unlike a lot of other drugs, it is directly toxic to the cells and neurons in your brain & organs. So using meth long term generally leads to poorer health and permanent changes in the brain that can start to affect personality. I've seen it in a lot of people I've known who used it for too long and have even observed these changes in myself. I hate seeing it happen to others, but I know addiction is not an easy thing to just say "hey you should stop" to, so the least I can do is try to help inform others and give them the knowledge to protect themselves if they decide they're gonna use.
Technically, every time one uses meth in recreational doses, they are giving themselves permanent brain damage and possibly organ damage. The brain is great at building new pathways and adapting with time, but it can only do so much and eventually you can reach a point of no return (parkinsons, psychosis, etc..).
My partner now hears voices, has delusions of persecution and talks to people that are not there. And this is even when he's not using. He loved to inject it too and after awhile, it changed him into a different person who now has some sort of psychosis/schizophrenia, that hasn't worn off or gone away, even with extended time away from meth.
Hope you are feeling better man! Take good care! All the best!