my daughter was a preemie too (she is 3.5 years old now!), but your post caught my eye on the main board. My advice is to eliminate dairy. I did eventually and wish I had done is sooner. She was soooo much happier after I did. During the first 6 months of life, a babies small intestines are highly permeable, to allow the maximum absorption of breastmilk, and antibodies. During this "leaky gut" period, the baby is most vulnerable to developing allergies. If your child is passing a lot of gas, he is likely also having at least some pain from it. I have done a lot of research on the subject and talked with allergists and it turns out that the cows milk protein is very difficult to digest for young children (and isn't designed for them to digest) and it does pass through your breastmilk. Ironically, in the NICU the ped. told me that she was allergic to milk based on the way she was responding to the formula supplementation she was getting (my milk didn't come in for awhile despite round the clock pumping). so they gave her some special formula. although i didn't realize the milk protein would be passed through my breastmilk! noone told me that. she was exclusively breastfed after she got out of the nicu and i had dairy in my diet, she had gas, cried a lot and had sandpapery skin, and if i had a lot of dairy, she even got diarhea. i made the connection one day and eliminated all dairy and all her symptoms went away. i also later learned that her sandpapery skin, which looked normal, but felt dry, was eczema, was was incredibly uncomfortable for her and very itchy. i met with an allergist and he explained the whole thing and said when she was older i could give her small amounts of dairy products and she might be able to tolerate after age 2 or 3. since age 2.5 she has been fine with a little bit of yogurt and a little bit of cheese. the cows milk protein passes through the intenstines which is very pourous and causes an allergic reaction for a lot of children. the intenstines mature for some children when they are a few months old and for some children when they are several years old. preemies intestines take longer to mature. this is all due to the cows milk protein. by the way, later in life the cows milk enzyme is typically difficult for most humans to digest. this is a separate reaction to a separate component of the milk. it is normal to have this difficulty with lactose. Northern Europeans developed the ability to digest lactose, but this is actually something they biologically adapted to. this isn't the case for the rest of the worlds population. because northern european descendants are the dominant group in american culture, and the dairy industry has a big marketing campaign. the message has been that it is abnormal not to be able to digest lactose and products have even been developed to help people digest dairy, so people take medicine, so they can have dairy! anyway, my daughter drinks water. we all use some rice milk with cereal and in recipes calling for milk. i made the mistake of trying soy for awhile and she developed an allergy to that as well. soy is a high allergy food and it is high in estrogen. don't make my mistake by turning to soy to replace dairy. i regret doing that.
p.s. i did also use the happiest baby on the block techniques and they do help. but in my daughters situation, i think they just made her pain and discomfort more tolerable. but the best thing was when i was able to eliminate her pain and discomfort and then i didn't even need to use those techniques at all anymore.