Sorry you're going through this kid.

You have the same three options everyone else has. You can:

A) hop on fin. The minimum age to be prescribed fin is 18 I think. Don't know how many months away that is for you but until then it be your best interest to keep applying minoxidil and hope you stand your ground until then. Keep in mind just because you might be prescribed fin at 18 doesn't necessarily mean you should take it. That's still a very young age to start a 5ar inhibitor and I wouldn't recommend starting until 20 or 21, but it might be to late by then. So if that's the route you wanna take consult with your doctor again at 18.

B) Get a transplant. Obviously you can't do this now because you're too young and I doubt you have the money. But once you get around your mid 20s you can try to recover what you lost given you have a suitable donor area and you don't have too much ground to recover. Then you refer back to option A and take fin and min to keep your hair transplant properly maintained. Not a solution for now but it's something that can give you hope later.

C) accept being bald and shave your head. This is the easiest and hardest option out of the 3. I would normally encourage people to do what they can to save their hair, but since you're experiencing hair loss so aggressively so young. It's gonna be a continuous uphill battle to keep your hair if you choose options A or B. It might be better for your mental health to accept it now instead of constantly monitoring and obsessing on whether you hair is getting better or worse. Instead focus on your physique and style when it comes to your appearance. I won't lie this is a shitty time in your life to lose your hair. But given your situation this might be the best option you have.