STOPPING BC?! *HELP*

I started taking the mini pill cerazette about 11 or 12 days ago but I'm having unpleasant symptoms such as sore boobs and twinges in my pelvis (feels like I have an ovarian cyst forming) I want to stop taking the pill right now but is that safe??? I can't get into see my gp until next week. Also my period is due next week. What do I do?