Been there, done that. DS had severe reflux until age 4, when he *finally* outgrew it. My new baby, who's 5 mos. initially showed the signs, but stopped. (Thank You, Jesus!)
Most people will tell you it's dairy, but that wasn't my experience. Not spicy foods, either. My ped explained it as a physical problem, that the sphincter muscle at the top of the stomach is just not fully developed yet, and it won't hold a darned thing in when the stomach is full. Therefore, IME, the biggest issue related to YOU is the force of your let-down. Mine is very forceful, and I was essentially darn near drowning the kid. He was getting too much milk at once for his stomach to contain. The thing that I did that worked a bit in the early months was to pump for 5 minutes before feeding, to let off some of the watery foremilk, so that what he got was the thicker more nutrient-heavy milk at a slower rate. I also only fed on one side at a time, a bit more frequently, so that his stomach was never really filled, and that helped, too. (Mind you, this was real across-the-room reflux, 4 years of it, and nothing we tried eliminated it completely. DS is still a picky eater at 10 because he got so accustomed to the pain of throwing up after meals.)
DD is 5 mos and is just now feeding on both sides at the same feed. There was a lot of milk there, and she initially had the same reaction to too much at once: she threw it back up, hard.
LLL has a good page on how to recognize the issue of overactive letdown:
http://www.llli.org/FAQ/oversupply.html