Vomiting

I took my baby to the doctors at about a month old as he vomits a fair bit of his formula back up. And I’m talking like power vomiting it up up at least 3 times a day and then just spill for the rest but they told me since he’s putting on weight it is fine it’s probably just all spilling. So since then I’ve started taking pictures of some of to take back to my doctor to show him as my son has starting choking on it while brining it up. Has anyone else gone through this or has any suggestions?