I have been on Ortho Tri Cyclin for the past year and a half. My doctor recommended that I try Yaz. The Monday after I stopped taking my active pills (my period had been flowing heavy to light for 6 days), I took my first Yaz active pill. I thought my period had ended, like it usually does after 6-7 days, and I've been having light bleeding all day long since taking Yaz. Is this normal?