mid month BLEEDING??

This is my first month on birth control... I am about halfway through my third week and my cycle has been so irregular! I'm taking Loryna, which is the generic brand of YAZ. I started my period on September 27, which is when I started the pack, and it lasted for 10 days. It finally ended, but I was only clear for 5 days before I started spotting again? It seems a bit more than slight spotting... is this normal? I know my body is probably just adjusting to the hormones but why is there so much more BLEEDING than usual? Should I stop taking the medication?