help me

Daniela • Just being me and that's more than good enough. 💃
So I started taking a new birthcontrol pill and on the fourth week you should get your period right? well I haven't started my period and now I don't know if I should continue the birth control because now I have to start my new set, and I'm afraid because I haven't started my period 
Should I continue or stop until my period comes?  
I took a pregnancy test and don't worry I'm not pregnant 
I'm just worried is it normal?