Stopped throwing up at 14 weeks and throwing up again at 16 weeks. Why?

Michaela
Well went to the doctor at 15 weeks the baby is doing amazing. But I'm losing weight like crazy. I went from 135 to 117 in just a few months. I stopped throwing up at 14 weeks then all of a sudden at 16 weeks and 3 days I threw up again like 4 times today. Is that normal?