Ask an Eye Doctor and Get an Answer ASAP
You should use over-the-counter eyedrops called artificial tears. Don't use eyedrops for red eye (Visine, Clear Eyes) that could cause rebound redness. Also you should apply a cloth soaked with cool water to your closed lids.
Until your eyes feel better or the redness is gone. It could be irritation from a chemical splash or a foreign object. If you have watery discharge, it could be viral infection. If you have thick discharge, it could be bacteria. infection.