I just don't get it...

I was tiny before I got pregnant.. then I gained almost 40 pounds. I'm 3.5 months pp and haven't lost a pound since having my daughter.. I even weighed myself the next day after having her and nothing! It's like she never came out and she was over 8lbs. I breastfed for 2 months before I slowly stopped producing :( but even with breast feeding no weight came off... I'm at the gym everyday day with 1 rest day a week and have been doing that for a month along a paleo diet, still nothing. My body definitely has changed but my weight hasn't.. it's so frustrating because it almost looks like I'm bigger. I'm really into fitness and I worked out before pregnancy also. No matter how hard I work nothing is showing improvement. Really discouraging when my body is betraying me.😞

1 month vs 3.5m pp