is anyone else gaining weight like crazy ☹️️

I had my baby 8 months ago, I was almost done to my original weight @105 (i know tiny), I was at 108 when he was 3 months. But out of nowhere I'm gaining so much. I'm up at 126 now. I eat the same as always. But it's weird. I know the paragard doesn't have hormones. I'm just wondering what it is .