No period ?

Mikki Louise • 2 Angel Babies - 16.12.13 - 02.03.14
Hello, I have been using glow for the past few months and they have been right every month telling me when my period is due.
This month however my period was due yesterday and there has been no show of it. I have had sex with my fiancé however we make sure we use protection. 
Any ideas?