If you can't get a vets appointment until the morning, sometimes dripping in some boiled cooled water into the eye can help to keep it hydrated & wash away any debris that's in the eye (I used to use a piece of clean paper kitchen towel as a wick & drip the water in).
If it's red in the eyeball my Orca used to get that, it was either a small bleed or infection in the eye.
It looks grim, but with eye drops (I used Tiacil regularly) & painkillers Orca used to heal reasonably quickly, it would take about a week of drops two or three (sometimes four, depending on the severity!) times daily.
I keep in eye drops called 'Remend'
Remend Corneal Repair Gel - 3ml
on standby in the first aid kit, it's also an eye rehydration product.
Speed is definitely of the essence, try & get her seen ASAP.
Healing vibes & speedy recovery to your gorgeous girl.
Xx