Measuring big, but 20 week scan was below average

[mower]

Got bump measured by midwife today, said I have a big bump measuring at 30 weeks when i am 28 weeks, didn't think anything of this as last baby was 9lbs. But now that I am home and thinking about it when I had my 20 week scan baby was just below average, thought I was having a smaller baby than before.

Am worrying now, can anyone give me any advice?

don't panic, babies and bumps tend to change and grown differently at different times, sure baby is just lying differntly so bump is bigger than needs to be!