I have a question

So after i gave birth I immediately got on the iud (the one that last ten years). Did it make yall lose a lot of weight ? I lost a lot of weight after I got on it but of course it could’ve just been I was loosing all the access weight from having a baby. But after i lost like 15 - 20 pounds I still was losing weight. Years after the baby I’m still losing weight and I cant gain weight (this has always been a problem for me tho). I just wanna know if the iud makes that problem worse, I’m the skinniest I ever been. Even back when I would have a hard time gaining weight I was still atleast over 100 pounds. Now I can’t get anything over 95. Also does sex kinda feel uncomfortable for y’all?