While i was working, something from a bed sheet (a fabric particle which is soft such as cotton) went in my eye, it hurts little.what should i do?

Flush eye: You may have gotten something in your eye or may have scratched it. If the vision seems fine, try flushing it out with eyedrops. Cotton would not do anything as it will hydrate and become very soft wihout impacting the surface of the eye. If the vision is down, the eye is reddening, or painful, or developing pus - then see your ophthalmologist.