Constantly losing weight while pregnant

Melissa • FTM to Baby Boy Lucas due 03/13/19 born 03/15/2018 💙 👣

Hey ladies I’m a FTM. I’m 5’6” tall and before I got pregnant I was 133lbs but because of all the morning sickness I had the first trimester I went down to 126 lbs but nearing the end of my first trimester I was able to gain 2 lbs (my doc was happy) but now that I’m 13 weeks 6 days I noticed I’m down to 125.6 lbs and that’s with eating ALL day everyday.

Anyone else experience weight loss like this during their pregnancy and when should I expect to gain some weight because now I’m starting to worry about my baby.