Dairy of all Kinds

My son had his one year check up today where we were told that he is only in the 8% for weight. He has always been "little", but this is a big change from his last appointment. I have been worried lately about his eating habits. He has been refusing food and not wanting to eat anything except veggie crunchies or goldfish. We have been working on the switch to real food for a couple of weeks and at the beginning he was very receptive and loved eating what mommy and daddy had, but now he refuses everything. This alone would worry me, but we are also going through the process of figuring out whether or not he is allergic to dairy products. He has eczema (thanks to his mommy) that seems to get worse when he eats dairy and recently he is getting a red, itchy rash around his eyes too.
To make things even more interesting, I have stopped pumping at work and we are trying to switch to some other sort of milk (cow's, soy, or rice). Wow! What a wonderful situation! Allergies, food, breast pumps and milk(s). The doctor told us that we should hold off on dairy for a week or two to see if things get better and to use soy milk in the meantime. Then we will try cow's milk again to see if there is a reaction. After having to have a dairy-free diet for just a week, I can't imagine what it would be like for Liam if it were a permanent situation. I had no problems with cravings, it was just so hard to find dairy-free products. Almost everything has dairy-even things you would NEVER think would.
I can't help but be sad that I passed these wonderful genes on to him. I have eczema, asthma, alopecia, thyroid issues, allergies to almost anything natural (except food, thank goodness). I know that at least now, Liam has eczema and it is highly possible that he also has ashma and allergies. So far, no sign of anything else, but it took until I was 5 years old for me. I am trying so hard to think positively, but it is harder and harder the more that comes up. Knowing how hard dealing with all of these issues can be, makes it so difficult for me to be so powerless to help him. I guess that is a lesson for a new mommy- we can't fix everything that they go through.