First off, I have only been doing primal for a month and a half, and I dont' know anything about candidia. I am a newbie. However, I had a similar problem with weight recently too, big loss then slight gain. I did mangage to push past the gain, from using the primal 101 guides AND re-reading portions of the primal blueprint book, and I found that *maybe* I was eating too much protein. And in truth I was eating a lot more than what I should have been for my activity level (per Mark/MDA)
That having been said, in my opinion the most important thing I think you can do for yourself is to be as stress free as possible. Enjoy your baby and your kids, and your time nursing. I know I sure did love those semi-quiet moments nursing my baby. And maybe just focus on simply maintaining your weight-loss of 11 lbs. You sure dont' want to get stressed about eating, too! Life raising kids is stressful enough. And don't forget, the stress hormone cortisol can sabotage all good weight loss efforts!
It sure sounds like you are doing everything right to me! But like I said, I am new at this. Maybe this is just a plateau?