First off, you need to pay close attention to hand washing, what you come in contact with, pink eye is extremely contagious and you can reinfect yourself, wash down surfaces.
You can find relief with a hot washcloth, make sure it won't burn your skin, keep it on until he cools off, then heat and repeat, this will comfort and help with itching.
You can find OTC drops at any drugstore however most doctors find its now best to let it run its course. Remember you are contagious, hand washing and hand sanitizer.
See your doctor if it doesn't show improvement.