Woo-hoo I lost 6 pounds since my last doctor visit!?

Im 18 weeks pregnant and since my last visit I lost 6 pounds, Mind you it was mostly water weight, But Im still happy. Im not a little tiny lady so Im gaining for the baby but losing some of this pesky body fat. In fact Im getting round like a watermelon. Im expanding front and back. I finally have a proper bum! Any other Mom's happy to have lost a few when pregnant.