You know, that's odd...
My daughter had this same issue last year, when she was teeny and I was drinking milk because I thought I had to to MAKE milk. I'm sensitive to it, and I was really suffering, and she was really suffering, too. I gave up dairy with glee, lemme tell you, and she slept well afterwards. I also had to give up my nightly Coke and some kinds of snack food. I found that drinking water helped some, and when she was at her most miserable, a couple of licks of a peppermint candy cane I held in her mouth seemed to help her out a little. (My mom suggested that, because she used to do it when I was fussy, and I was always fussy because I was a formula-fed baby before hypoallergenic formula...I wish she'd breast-fed me.)
There's a fuss-food list in the Baby Book by Dr Sears, and a list about common causes of night waking. They might be on his website, www.askdrsears.com
. but I know they include beans, broccoli, cabbage, dairy, chocolate, nuts, caffeine drinks, and some herbal teas.
And, just so you can feel better, soon, he'll sleep like a dream...as much as babies ever sleep like dreams. When my daughter woke up with gas and wouldn't go back to sleep, I used to dance her down to sleep or walk 'round the block. Invest in a super-thick bathrobe!