Booze and smokes are the only things you need to quit, not exercise
! You can try new, less cardio exercise
too, and not just pregnancy focused stuff. Pilates is great but there's also weight lifting, body weight training, non contact social sport, swimming... You're pregnant, not an invalid ;)
Any other fit ladies out there want to share too? What did your doctors say about exercise? 34 weeks of Barre definitely helped me and was definitely not easy either!