Some stranger said I'm Glowing?

Jacinda
So I was working all day Monday, I'm a server and as a customer goes to leave I tell him and his friend to have a good day he thanks me and says 'by the way your glowing and radiant'  at first I thought it was just a sweet compliment but then he goes 'No, your glowing, you'll figure it out eventually' 
Umm what!?
I know people say that to pregnant women but as far as I know I'm not pregnant...do they have a certain glow or something