Dont worry. God has designed the human body such that small things tend to take care of themselves. It might be that u have caused a small burn in the skin of the eye(conjunctiva
). But this tissue is pretty resilient to damage. Watering is the way of the eye to remove any dust or to take care of any small foreign body.
If you dont feel ok in a day, then maybe you can consult an eye specialist. In the meanwhile take care that no dust goes into your eye.
get well soon