What Are The Side Effects Of Cerazette Pill?

I have been taking the Carazette Pill for the past month but was under the impression that i had to stop taking it for a week for my period to come. I didn't realise that i had to continue taking it for the entire month and then open a new strip for the next month. I stopped taking it on sunday just gone and havent had sex so i'm not at risk but would just like to know when it would be best to start taking it again?