Hello girls!

I'm sorry for that type of question, I'm first time mom, so I don't have any experience..

Baby is 3 weeks old and it's seems to me that he has diarrhoea. Days before I've changed max.1-2 dirty nappies, last days he pooped very small amount. But today I've already changed 5 dirty nappies, he pushes all the day and with gases exit the poo. He eats normal, every few hours, he sleeps and pee. While he pushing he is crying of course.
I'm afraid that it's diarrhoea and he will get rehydrated.