Is losing weight during pregnancy not a good sign??

Emi
I'm 14 weeks today and just found out 2 days ago that lost 1lbs. Before that I gained 1 lbs. I actually had food poisoning a few weeks ago and had to go to ER to be treated on strict diet for couple days. I don't think that affected the weight loss much but I'm surprised I lost weight! I've been eating just the same no less I think, I snack often too. 
Please share if you have experienced weight loss during pregnancy! Thank you. My ObGYn didn't say it is concerning but she didn't say much about it.