I too did not do a formal Sears elim. diet. I just cut out the main allergic foods: Dairy , Soy, eggs, nuts. I saw a huge improvement in my ds's skin. No more rough spots. I too lost too much weight. Make sure you eat a bunch of olive oil and or an omega 3 supplement. You and your baby need it. My favorite meal... rice, black beans, onion powder and broccoli. It's actually yummy.
I did have to give up my soy lattes. I reluctantly substituted rice milk. Now, I'm used to it.