you need to stop sleeping with your contacts in, that can lead to big problems. Your eyes need to breath and they can't do that being covered up all the time. Your vision is nearly exactly like mine and started at an early age too. I don't think that swelling/soreness would be related but you need to see an eye doctor asap. My mom just had eye surgery and also saw these floaters increasingly more with time. Don't play around and wait too long. Even you are young, it doesn't mean you can't have problems. There a billion things it could be.
