Looking pregnant!

Kirsty
So I don't know whether to be annoyed or not but it has upset me a little I don't know why(probably the hormones)
At work today and as I was walking away from someone they turn round to their friend me say "she doesn't even look pregnant". 
It really has upset me and I know I'm probably over reacting but I can't help it, anyone else been in this situation?
Should add that I'm 31+1 now