33 weeks and concerned

Amanda • mommy of a 6 year old princess now expecting a prince💙👶🏽
I woke up this morning and my stomach was half the size my husband and sister in law and mother are freaking out. I also have been weighing my self the past week and I haven't gained any weight I actually lost 2lbs. The baby is still active but I'm not sure why my stomach is smaller and why I'm not gaining anything. I'm going to post a pic from yesterday which I was much bigger and then today where I'm smaller....