Well at term they said from my U/S that DD was 7lbs 14oz. Nearly 2 weeks later she was born weighing 7lbs 14.5oz. In those 2 weeks i'd gained 2 kg, i seriously doubt she'd only gained half an ounce in those weeks, so SOMEONE was wrong somewhere along the lines.

If it's any comfort the bit of a baby that "hurts" is the head, and big heavy babies and wee skinny babies all have a 34-37cm head, a difference which you wouldn't feel. My sisters SIL had twins in he 70's with twin to twin transfusion syndrome. Fortunately it wasn't bad but one was way smaller. Twin one was 8lb even with a 36cm head circumference, twin 2 was 5lbs 9oz with a 33cm head and she said #2 hurt more! She wasn't torn either, so it wasn't that which made it hurt. Try not to stress hun.

Bx