Confused

Holly • Hi! I`m 21 years young! School full time, while I work part time. I have the most amazing boyfriend in the world, we are like each others best friends and couldn`t be any more happier! ♡
OK so I'm only 7 weeks and it stuns me seeing ladies on here with a huge baby bumps as if they were like 7 months and they're saying they're 6,7 and even 8 weeks pregnant. Now everyone I've known that was 6-8 weeks pregnant never had a bump that big yet. It worries me to? Is there something wrong with baby? Or am I overreacting?