I feed my 6 months LO banana puree. I cut the banana and smash it into puree. I give half of the banana and after that I let LO drink plain water but he choke and cough suddenly and vomit all the puree and undigested milk 3 hrs back he drinks. He vomited quite a lot. Is it I give him too much puree? Or right after eating puree I can not give him plain water? Or his body cannot hole so much banana puree? He looks okay after vomiting.