Losing Weight 2nd Tri

Lexi • Kinsley Jo 3/8/16 😍 Khloe Grace 6/7/17 😍
I'm 13 weeks 2 days and I used to weigh around 131/132 lbs before this baby (my second) I got pregnant when my first was 6 months old, and I now weigh 123. I've lost 8-9 pounds and I'm almost to my 2nd trimester. I feel like getting pregnant so soon is taking a toll on my body :/ I steadily gained weight with Kinsley and this time I'm losing weight pretty quickly. Is there anything I can do? I'm freaking out a little.