Mom, hi! I don't even understand what's going on anymore, but the baby…

Mom, hi! I don't even understand what's going on anymore, but the baby is constantly crying and pooping like a duck, just diaper changes every five hours all night long. I read that 10 times a day is already diarrhea, it looks like we have it. It's been going on for a couple of days now. The consistency is almost like water, sometimes yellow, sometimes greenish. We have to leave today for two days, I think we need to go see a doctor right away, but maybe someone can tell me if they had this and what they did? My tongue feels itchy constantly, it gets stuck in my hand, there's a river of saliva, I thought it might be on my