ER or no ER?

JS
My 2 months old has cold clammy hands, feet and face. She's been sleeping an abnormal amount and also seems to have diarrhea. Our Dr can't see her until tomorrow. I was considering taking her to the ER because everything I've read sounds like it could be pretty serious, but that's why I hate Google sometimes. My SO says not to take her but I don't know what to do. What would you guys do?