my baby is 3 months old. he is on mixed feeding. usually he burps well, but for the last 2 days, he feels uncomfortable while burping, yet he burps. Yesterday, while breastfeeding,all of a sudden, he started crying a lot, seemed like he can't breathe and something is stuck on his chest. We patted his back and after a few mins, he felt better. Today also, after a feeding, he burped and then he started playing. Suddenly he started feeling uncomfortable , then we again tried to burp him, and he burped for the second time, after which he felt better. what is the possible cause and solution? Note- hiccups also happen to him , and it lasts for 5 mins, during which he feels very uncomfortable.