Dog is drooling!!

Kaity

Before I start I called the vet and they can’t see us til this weekend. Just wanted to see if anyone knew what could help her until then! At first I thought she had she had a uti because she was having trouble peeing, but last night I was woken up because my bed was wet and she was wet, it was her drool!! She is drooling a lot, and now has a rash under her neck, where the drool is running down at. Her behavior isn’t changing. She plays all day, and is eating normally. Only thing different is she’s drinking a lot more water! Has anyone had this happen and know what could be the cause? Rash doesn’t seem itchy and also we changed her food about a month ago and am not sure if that could be the cause or not. Any advice is welcome!!