Gaining weight quickly

Co • 9/8/17💍 9/22/19 🎀

I’m 7 weeks pregnant. I feel like I’m gaining weight to quickly. I’ve already gained 12 pounds. I’m 5’ 6” and was 128 right before getting pregnant. I’m now at 140. I’m still active, go to the gym, and eat healthy. Is it okay if I’m gaining so early? Has anyone else just gained at the beginning?