Hi. I would suggest not eating dairy. I would suggest starting there and if after a few days there is no improvement then look at your diet and see what would be a possibly cause. I had to refrain from peanut butter with my 1st child and chocolate wiht my 2nd. When I ate the above and then breasfed later the baby would be very upset during and then really upset after.
Also maybe try burbing in the middle, maybe that will help.
Something else I did that many ppl have different opinions on is, I used Gripe Water for my 2nd baby. She was so fussy with digestiion that I would give her Gripe Water before a feeding and sometime after. It was a life saver for us.
Best of luck!