Hello, I am also pretty new here. This a very helpful and supportive site. I am also young like you but I am a male (25). Its crazy to take this all in but we can overcome this disease.
Just do everything in your power to fight back. Medication, exercise, diet, yoga, meditation, etc etc. Also make sure all your nutrition levels are at the right level. Everything plays a very important role against it not just one thing.
I showed my first sign at 19, but was not diagnosed because everything came back negative. Then went through another episode at 25. I showed many different symptoms but none of them even began to slow me down.
Never be scared because we do not know what will happen or when something will happen. Take advantage of the fact that today you feel fine and normal and enjoy life to the fullest. Staying positive is the absolute most important part.
We have time on our side, the cure is right around the corner. By the time this creature seriously gets to us, there will be a way to repair the damage.
Best of luck to you,