6 month old throw up! Help!

My son is 6 months, this started maybe 3 weeks ago to a month ago. He recently started being WAY more active, im talking... standing up along the play pen crawling rolling around twisting everything. He no longer wants to be burped for the amount of time I think is necessary... maybe 2-3 times this month he’s been fed— then after not burping for a few min and starting to want to move around he coughs after a small sound of formula coming up (normal spit up size) doesn’t spit that up rather choke on it kind of and start coughing like he tried swallowing it and then ending up coughing until he hurls into a vomit. The vomit is normally warmish, and a normal formula consistency. No diff colors... I wanted to be as much detailed as possible figured every detail count.

Thanks guys.