1 month old DS has had diarrhea 3 times today and has been vomiting milk. The vomiting may be because he burped only once after drinking 3oz? Usually he burps 2-3 times after a feed but he only burped once today. Should I be worried? I can’t help but worry. He seems fine in himself, is feeding properly too. What should I do? First time mother as is obvious. I’m mixed feeding btw. Mostly breastfeeding but I’ve had really bad mastitis and a fever so I’ve been giving formula too.