Wow, your story is so similar to mine, right down to the abusive family members and genetics gone awry.
My answer probably won't instill any hope either, if anything, it's further proof of the utter randomness and luck of the draw one experiences in the life roulette.
I got sick with chronic fatigue when I was 17, after a couple of viral infections. My immune system was very poor, and I had several vitamin deficiencies at this time. Doctors gaslit me for years and told me I was depressed, until the symptoms were too glaring to ignore. Now my issues are permanent, as it's been nearly 5 years and I haven't recovered at all, only continously deteriorated.
My mother had chronic fatigue syndrome too, and was too ill to raise me growing up, so I've spent an entire lifetime without a mother, because she chose to have kids she couldn't take care of. Autoimmune diseases, brittle bones, autism and other developmental disabilities, cancer, etc all run in my family, yet no one in my bloodline spared a thought about whether or not it was a good idea to gamble with bringing another child into this world who could suffer from these conditions.
Over the years, I've had to watch my peers experience the peaks of their lives. Most people my age are in their prime. They are the healthiest and the most invigorated that they will ever be.
For most people in their early 20s, doing chores, walking to the shop, and standing up for long periods of time is no bother. They can stay up all night, drink like fishes, eat whatever they like, dance in clubs till the next morning, pass out wake up and do it again with no consequences.
Meanwhile, here I am. Chronic fatigue, chronic pain all over my body, autism, ptsd, tmj, horrible eyesight, many allergies, ibs and constant digestive problems, tinnitus, the list of problems continues to stack up as the days go by. Some people say your body is a temple, but mine seems to be a Jenga tower built on loads of loose, shitty blocks.
Everytime I bend over or stretch too much, my joints crack. Even eating food or yawning, my jaw cracks. I live with persistent neurological disturbances such as brain fog, visual snow, floaters, etc. For the past few months I've had constant headaches too. My legs have felt as heavy as lead, yet full of pins and needles, for many years now. All the muscles in my body constantly ache, but my back and legs are the worst. I am constantly fatigued every second of the day, with frequent bouts of dizziness and nausea. I cannot regulate my body temperature properly. I cant eat anything without feeling sick. My ears ring all day, everyday. I can't stay asleep because my bladder fills quickly and I always have to get up to piss in the middle of the night.
I was forced to work hard in low paying jobs as a teenager, because no one believed I was ill. They thought I was lazy and grueling labor would fix me right up. This exacerbated my pain and my inevitable decline. Once you lose your health, you won't get it back. Do not make the same mistakes I did.
Some people are fortunate to have good health well into old age. Others like me are simply cursed. Hence why I am spending my 22nd birthday laid up in bed, because I am in physical agony. It can happen to anyone, at anytime, and that's one of the scariest things about this life.
I wish none of you had to deal with health problems, regardless of age.