Eye trouble

Des • Oliver Jackson DeSimone💚
My son woke up with a lot of yellow pus in only one of his eyes. Last night I noticed an eyelash on his waterline but I didn't want to get it out my hands weren't clean I figured it would go away with him blinking. We also had someone with a cold in our house... Any ideas what it could be? :( I will be calling the dr when he wakes up and after I take his temp.