I would recommend changing your diet. Gassiness comes from sugar, certain veggies and fruit. Also, dairy can cause a lot of gass and discomfort for a baby who is nursing. I have two children, one who is 18 months old and the other who is 2 weeks old.... My daughter was nursed for 12 months and we plan to do the same for our son. We had a lot of trouble with gassiness and when I changed my diet... it helped a ton. Also, there are infant gas relief drops that work like magic from Little Tummies. If that doesn't help, you can try to mix a little bit of Similac sensitive( orange container) formula in with your breast milk.
If your looking to increase your milk production.... think carbs!! Drinking poweraid helps, eating wheat helps (Cheerios ceral, oatmeal cookies, oatmeal ect). There are also herbs you can take that will increase milk productions such as feunerik. You can purchase this at the little miracles store inside the mercy west hospital. They also have a mothers milk tea that stimulates milk production that is very very good.
My mother in law also recommends that drinking a beer a day will help increase milk flow. I asked my doctor about this as I though for sure this was a myth. To my surprise he also recommends drinking a half a beer a day if your having trouble with milk production. There is something in the yeast of the beer that stimulates production and its not harmful to the baby. I wouldn't recommend getting drunk but a few sips of a beer to a half bottle of beer will hurt the baby. Good luck