Losing Weight in the first Trimester and no nausea

CiCi
I have lost almost ten pounds in the last 6 weeks. My doctor said it is normal and I will gain it back then some in the second trimester. I am a little confused by this because I ha e been eating like a pig. Has anyone else experienced weight loss without nausea? 
I have my second doctor appt today for another ultrasound I am so excited!