Is my breast milk still okay to use?

Ma

I pump at work and store my milk in a cooler with an ice pack (the medela brand cooler). I filled it at 10:45am and 1:30pm. I accidentally left it in my pump bag over night and discovered it at 8:00am this morning. The bottles were a little colder than room temperature. Do you think it's stil okay to use it toss it. My cheat sheet of breast milk storage says it's good up to 24 hours in a cooler, but the milk wasn't super cold I'm nervous.