Can a bump be too big?

I am 15 + 4 and I have what I think is a little bump. However, people keep commenting ‘your big for where you are’ / ‘is it twins?’

I was a UK size 8 before becoming pregnant but I am a long way from that now!

I look at the bump pictures on here and when I see one that makes me think ‘it’s not only me’ it’s always of a mum who has had children previously. This is the first time I’ve been pregnant and although I love my little bump... other people have got me thinking that something isn’t right 😐

Any advice would be appreciated