Well yea it is different for everyone. When I was pregnant with my son carter I noticed at about 14 weeks that my stomach started feeling different. At 16 weeks I felt him move for the first time. Yea im sure that you could notice you tummy feeling different if you didnt find out that you were pregnant until later in the pregnancy.
That is how my pregnancy was with my daughter taygan and that was 5 years ago when I was 13.

thanks
chole wise