Try not to worry. When you have the u/s then you'll have a clearer picture. As for bub being too big, this is actually not usual (doc told me that) as our bodies make babies we can birth. I'm only small and Elijah was my biggest at 8 pound 4 but a wise lady told me before his birth that it's not the size of the baby but the head you need to think about as that's the biggest part. It was true and I focused on that instead.