If you treat the pink eye with antibiotics then usually the pink eye is no longer contagious after 24 to 48 hours and then you should be able to return to work.
So since today is Saturday and you don't go to work until Monday then you should be fine to return to work with the pink eye.
But if you want to take a day off and wait until Tuesday then that would be much better just to make sure the pink eye has stopped being contagious and so that you'll feel better.
So yes you can return to work by Monday but if it were me I would just call in sick for Monday and wait until at least Tuesday to go back to work.