Sounds like you are doing all the right things Sush, good on you hon. Heck, I never even walked for 30 mins once a week during my pregnancy! I did no exercise at all due to sacro-iliac (lower back) problems and I had small babies! I wouldn't be to happy with what my doctor if he was telling me that! You know you can always get a second opinion if you want it. Marisa was 6lbs 10oz and Elijah was 5lbs 15oz - so you may even find you have a smaller baby yet - after being told all this time how huge things seem. It's crazy.