If you were over weight before you got pregnant and now are eating healthy and consciously then it is fairly normal to loose some weight. Also if you have had nausea and vomiting weight loss is normal. Thirdly as tastes change and you don't feel like eating most foods it is common to see some weight loss. As long as baby is developing well there is no cause for concern

pls make sure u r eating healthy nutritious food. some ppl do lose weight. do discuss with ur gyno on ur next visit.