I'm 27 weeks and one of my coworkers didn't know I was pregnant. Another girl and I were talking about baby stuff and she was like uh why are you buying baby stuff? And then turned to the girl I was talking to and loudly whispered Is she pregnant? I was a little offended. I dont have a big belly but im noticeably pregnant. Maybe you're carrying your baby more to the back? Some people dont pop out until the very end of their pregnancy