I too have experienced this weight loss! I gained 60 lbs during pregnancy over a normal weight. I have since lost more than 80 lbs and am feeling way too thin! I do eat as much as I can and limit exercise to try to put a few pounds on. My husband and I are looking forward to me getting pregnant again once my fertility resumes just so I can gain some weight!! I am still trying to put some weight on in the hopes that it won't impede returning fertility. I'd like to continue nursing through the pregnancy if my daughter and I still want to and hopefully tandem nurse - will this create more problems with my weight loss? I would appreciate any first-hand experience!