is it your first? are you excited?

So about a month ago.. I was somewhere with my husband and father in law and this lady she was older like 80's looks at me and says oh is it your first? Are you excited? At that time I was a week late and knew I was going to start soon.. 
My husband and father in law were like oh it's the shirt you are wearing.. 
Another lady was like I had a lady say that to me one time and then like a month later I found out I was 6 weeks..
Has anyone else ever had that happen before? I was so discouraged after that..