Welcome! Good for you deciding to do Primal for you (and your baby) even if hubby won't. Here are some thoughts about selling someone on Primal, but the main message is that you probably can't, which you have realized.
Mother Nature may not let you lose much fat while you are nursing. You will be a lot healthier though.
My suggestion is to just stick to the basics of Primal. Some people need to do it strictly but you only have to do the 80/20 to realize the benefits. Good luck!