Hiya,
I wanted to add...
...(in the UK) I asked my health visitor to be referred to a dietician because when dd was 5 months old her eczema definately responded +vely to me eliminating dairy from my diet (She was ebf until 5.5m). They did this with absolutely no problems. Sophie went onto solids and I couldn't express enough milk for her the dietician prescribed soya based formula which was really useful as soya formula is quite expensive. Sophie has never drunk it as a milk drink but it has been quite useful for cooking with. Now she is on proper soya milk for cooking with. For some reason (the dietician told us) girls can have regular soya milk from 6m, but boys need to wait until they are a year old. It was really useful seeing the dietician. I would recommend it if you can.
For bf Mum's, after trying many Soya milks out, the best tasting one I have found is Alpro Calcium enriched in a tall, blue tetra pack. We get our from Sainsbury's and it can be found alongside all the other milks. It's fine on cereal but I wouldn't drink it and its pretty rubbish to cook with although it it does work, the results aren't the same as milk.
My only other experience with dairy allergy is that most health proffessionals (doctors included) are fairly skeptical that eliminating dairy will work. However, I would suggest giving it a go for 3-4 weeks. You never know, if it works, excellent, if it doesn't you haven#t lost anything.
Hope this helps
Claire