Can't drop the last 10 lbs!!

I'm 4 weeks pp I've lost 20 lbs within the first two weeks and I have changed my diet because LO might be lactose intolerant so I've cut all diary out. I've been eating healthy with very little fat but I have not lost any weight since the 2 week mark. Why? 😫😫😫 feeling so fat and distorted. It's even causing problems with my SO. He doesn't understand that none of my clothes fit and it's all in my waist.