Mom loosing too much weight while nursing?

I've been EBF for 3.5 weeks and I've lost more than ten pounds below my pre-pregnancy weight. Everyone keeps commenting that I look good, skinnier than I have in years. My weight now isn't bad in itself, but I will be nervous if I keep losing weight. I eat as much as I'd like, a lot, when I am able to eat. Can anyone say if this happened to them early on but they bounced back once baby got a bit older?