I say try a counselor or therapist. From your words, it sounds a lot like you're needing a place to feel heard. It might help you with anxiety and relating it to your family.

Is anyone saying conversion disorder? Sometimes when people get a diagnosis like conversion disorder the patient only hears that their visual impairment is ‘all in their head’. This could be why doctors and your parents don’t seem to care. If this is your diagnosis please understand that it’s not as simple is willing yourself not to be blind, or that you are simply making it up. It means the doctor you need to treat you is a psychologist, not an ophthalmologist. You need to work through whatever stress, anxiety, or trauma is causing this symptom, and an eye doctor can’t help with that. My job is to teach the braille and cane skills you mentioned and I’ve worked with students with conversion disorder before. In my experience, the training I give them isn’t very helpful because their brain can process images. It just feels like they can’t. These students are the ones that will sharply veer off course to strike an object with their cane instead of walking as anyone else does with a visual impairment. They look at braille with their eyes rather than feeling with their fingers... which doesn’t help any eye strain they may feel. I’m not saying this is what you have, but if the eye doctor gave you a clean bill of health you need to go talk to a psychologist.

With your diagnosis, or lack there of, can you access any help in your area? I know in ireland all OM falls to a charity (NCBI), as do daily living skills. Braille is thought by the government teachers for the blind. Have you contacted perkins school for the blind in Massachusetts? They could point you in the right direction. Do guide dog charities in your area also do cane training?

Do you find that there's a color that attracts your attention more? Like red, gold, green, etc.

Is it harder to view 2D images such as pictures than 3D images?

Is it hard to use your vision when people are talking or theres distractions around you?

Do you visually 'lose' items if they're placed on a busy background, such as a patterned comforter?

Are lights or movement distracting for you? Have you ever found yourself staring at ceiling lights or fans?

Edit: I noticed that you stated that you 'had' ROP in another post. ROP doesn't just go away. Its a lifelong condition.

Speaking to making it easier to read and write...every phone computer these days comes with magnifiers and screen readers, and there are $1. National federations for the blind provide free to very inexpensive introductory braille materials (and lots of free advice). You don't need any cash or parental approval to learn, so you could quietly arrive at college on day one with those skills in hand and then quietly visit their office of disability services to learn how to get yourself a 504 plan to make sure your course materials were accessible to you.

I hope you are able to get another second (third/fourth) opinion. Most people with rare and weird symptoms get told it is all in their head by mundane local doctors until they can find a doctor who can actually diagnose it because they have seen it before. So many weird things out there, and I know a lot of people who had some terrible years being dismissed by doctors for things that turned out to be treatable but rare. But even if it WAS psychological rather than physical in origin, that doesn't mean it's fake or your fault or something you can wish away; psychological symptoms are REAL, persistent symptoms that need REAL treatments -- then you should have a constellation of doctors working on cognitive behavioral therapy and specific eye exercises (migraine specialists have ocular physical therapy techniques) and things like that (maybe you do I dunno). And if THEY see you are highly motivated and compliant patient and it's not *doing* anything, they can call your physical doctor back on your behalf and tell them it's sure as heck *not* in your head and you need more tests and/or to be declared legally blind for the accommodations and benefits that provides.

You can see "color that's about it" but you're driving? How does that work?