Payton gets a bit gassy, too. But, for us it is due to my over active let down. If your baby chokes at all on your milk or comes off because s/he can't handle the flow and your milk squirts across the room, you can be experiencing an over active let down. If your baby spits up a lot, this is another sign. Three babies later, I finally have the hang of dealing with it. There a positions that are better (like you laying back and baby laying face down - sort of) that work against gravity so that the flow is slower and then baby is not guzzling so fast to keep up and getting a lot of air in the process. Payton is no where near the spitter my first born was when I had no clue. And while she is gaining well (2 lb 2 oz over her birth we eight at her 1 month appointment) she is not gaining a pound a week as my second did - high weight gain is a sign you may have oversupply which often accompanies over active letdown. My second guzzled every drop and had the Michelin Man build to show for it.
Payton actually gets burped - never thought much about it before. Lol! And, like the others, only nurses from one breast per session and continues to nurse from the same breast if she just wants to comfort nurse to make sure she isn't getting just the foremilk which can happen if I let her bounce back and forth between breasts. And I also don't drink Mother's Mikk tea or eat oatmeal every day. Once I have to pump regularly, but, for now, no. Oversupply can cause problems just like under supply can. Because, of course, mastitis and thrush (which I had with my first) are more common when too much milk is flowing.
Sorry for the novel, but, hopefully it helps someone.
Mama to a dd 10/05; ds 3/09, dd 2/15 and two angels. Expecting another miracle 7/16!