Weight loss while pregnant??

I have lost a couple pounds from my pre pregnancy weight. I am currently 32 weeks. Which when I calculate theres like 2 lbs for extra blood. 2 lbs for uterus... 2 lbs for amniotic fluid... And more! Also including my baby weighed 4 lbs and 14 oz at 31 weeks. So adding all that up I have lost like 20 pounds... Or atleast 15. .... But my body looks the same. (Besides big belly) lol I dont feel thinner or look thinner in other places like my back legs arms and face... So weird... Anyone else experienced this? How was it after birth? Did you appear thinner then? So confused lol.