Bump Sizes!!

Hi! So might sound a bit strange for those who have big bumps already but I'm feeling abit sad about how tiny my bump seems to be. I realised this when I sat in the room of 5 pregnant woman yesterday (glucose test) all of them where actually less weeks pregnant than me (I am 28+1) but all their bumps were much bigger than mine! I'm a bigish girl anyway and I'm not complaining because obviously less baby weight to lose but I've been suffering with SPD and awful growing pains from round 16 weeks which I would think would mean bigger bump but apparently not! My midwife has not mentioned that my baby is small or anything. Does anyone else feel the same? Sounds bizarre I know but after waiting 3 years to conceive I definitely want my big baby bump to love and take looks of photos of!! :-)