Weight loss

Muirielle
Im 14w5days. I have always been overweight. 3.5 weeks ago I weighed 223. I should of gained roughly 4lbs right?. .... well instead of gaining im the smallest ive been in many years. Im down to 214lb. Morning sickness is really bad for me 7 liters in 2 days plus more during week? HELP idk, what to do this is first baby and ive passed out 1 today as well.