Ok.. You need to take him in TODAY.. Im sorry but I'm an Optician and an eye is an eye.. human or animal... If it is pink eye and you let it go he could do some REALLY BAD damage to his eye... This is your baby and your the only one he can count on , don't make him wait till Monday
When you see it getting crusted and closed take a warm wash cloth to wipe it... Then I would throw out the cloth or bleach it...
Good Luck .. PLEASE keep us posted