Steph, I had Milena on rice cereal from 6 months, I used one with no milk (from what I remember when reading labels, the Nestle one DOES have milk), I used water to mix it with as I bf but never pumped. She had no problem with the rice cereal, had a rash/reaction with the brown rice and the oatmeal rice but was able to eat both at 9 months.
Amanda, have you ever tried Oval drops? When my dd was super young she had the typical problems with gas and I found these helped. I'm not sure about lactose intolerance as my dd's was a full blown protein allergy (she always had severe pain and blood in her diaper). How is he in the daytime with his formula? What are his poops like? Usually the protein allergy results in bleeding intestines, abdominal pain, irregular and mucousy poops and intollerances result in poops that are not regular, excess gas, and sometimes rash or even excema.
Milena update- she's doing well with one container of plain yogurt a day and about an ounce of cheese. We were up to 12 oz of whole milk per day but she had loose and stinky poop that looked like her food going in. Have taken her off the milk and retried each week. I'm thinking she's over her "allergy" because she can now handle cheese and yogurt and I'm eating EVERYTHING with milk again and she is not reacting and has had no blood in her diaper. I'm now wondering if she's developed a lactose intolerance which, if she has, I'm not too worried about, it's so much better that the full blown protein allergy!