My Cocker Spaniel Dog Chester Is Just Standing Still And

my Cocker spaniel dog chester is just standing still and looking at the floor. He is not responding to his name and doesn't want food. Normally if i open the front door he is so excited ,but he just stands there. He has weed on his bed and poor in the house. I am really concerned . Pleas let me know if there is anything i can do until the vet opens this morning . Or should i go to the emergency vet ? Thanks Helen