10 weeks pregnant and still losing weight!

Hey everyone, okay so im not a first time mom, this is my second lil one on the way. But i was wondering if anyone is losing weight without trying in first trimester. Im 10 weeks as of today and losing about 4 pounds a week without trying...kinda concerned that this shouldnt be happening. I do eat though and I've been trying to eat more proteins and fatty stuff to try to gain some back but I don't know whats going on. Anyone have any thoughts or is going through something similar? Thank you in advance for any opinions/advice. 😊💕😊💕