Holy moly! Your post makes me want to tear up... That is quite disappointing....
Anyway good luck to you and your life...
I think we all have problems to deal with, at least because I also have my own problems as well now. It's so freaking weird, you mentioned at one point you were an athlete, let me guess, you didn't have any problems in your life during those times or at least compared to now, you would think those problems never existed. Same here!
At one point the only 'problems' I had were; 'getting a girlfriend', 'earning more money', 'losing weight', and maybe 'study for this test' non-issues.
Those problems are inconsequential compared to something like 'fixing a broken marriage', 'trying to get out of debt when you can't even make ends meet' and 'daily chronic pain making you unable to do daily activities'. Now
those are real problems that are actually hard to solve!
You should be thankful if you don't have any of those problems. I am very thankful that I currently am not facing any of them, but it could definitely happen at any moment and I am not denying that. For example you might suddenly get a life-threatening disease one day. Trust me, we all think 'we won't get it' or 'it won't happen to me' but yes, reality strikes fast and anything can happen.
Anyway I've already gone through chronic pain and surgeries, so I definitely know the feeling of pain and disability. Right now I'm facing possibly a worse issue than what I experienced before... I only had to experience a few months of physical pain, which at the time were really strong feelings, yes I even often had that feeling of 'kill me now to end this pain' but that is now a distant memory.
Now I've gone to new territory... Mental anguish... This one I consider even worse as it dictates how you live your life and how you react to other people... Just thinking about it paralyzes me... It's so bad... My only advice would have to be watch out to what people tell you... Someone's opinions may cause you to overthink, disrupt the entire flow of your thinking state and look at the world in a brand new perspective, a worse perspective. Trust me it happened and it happens.
I've gone from very optimistic, very open, and very trustworthy of other people to suddenly resenting, even seriously hating groups of people, no it's not due to race, social status, or classification of the norm but due to a certain action. Seriously, sometimes I would experience intense rage... Very intense rage... Due to my thoughts. You know what I would rather feel that intense rage? Depression. I would rather be depressed than angry, the difference is in one you feel like there's nothing you can do so you are depressed, in anger you feel like other people are at fault and you want to fix them so you are angry. I've never felt so angry at the world before being introduced to this school of thought...
I'll keep up to date here on my progress with this and I'll get rid of this plaguing mindset. It's brought me nothing but unhappiness. Worst part is sometimes it pops up randomly. You are working on something, then boom, there's that thought, then all of a sudden throughout the entire day it just keeps popping up, no matter how much you try to focus on your work, it just pops up. Even when someone does something, I think 'oh they must be so and so' when originally I would have not cared nor judged! But yeah things are different when you look at things differently...
So good luck with your life man. I wish for all of us the best...