Baby measuring big!

So I went for a growth scan on Saturday and I was 33+5 and they’re estimating my baby’s weight to be 6lbs already😰 I know it’s just an estimation but I’m genuinely concerned about having a massive baby! My first born was 8lbs 14oz at 41+5 and that was a very hard labour and delivery, I don’t think I could do it if this baby is bigger! They’re saying I don’t need any further growth scans even though I’m in the 97th percentile and that doesn’t make sense to me, I feel like they should definitely keep an eye on his weight.. anyone else expecting a big baby? Or has anyone been told they’re having a big baby and baby wasn’t that big at birth?