Reflux

I'm pretty sure my 3 mo old is developing or has developed reflux. He's eating same amount but has been spitting up more than he ever has. For example, if he did spit up at all up it was very little right after eating, today he spit up 3 hours after his bottle (he spit up more times than that). First time mommy here just wondering what to do to make my little man more comfortable.