17w and not gaining

Ruscell • Im 27. I have 3 beautiful kids and a step son. I am on my 4th baby finger crossed. 8th pregnancy.
I have lost 10lbs since finding out i was pregnant and havent gained anything. Still losing weight and eating anything i want. Never had morning sickness either. I did the same with my last pregnancy and the doctor had no real answers except multiple ultrasounds and baby was good she was born 7.4. With my first i gained 26 and 2nd i gained 34. These last two pregnancies are blowing my kind lol. What is everyone elses weight status?