I just started these pills (gildess 1/20) today and my period started last tuesday. When I got my prescription the lady at the doctors office said to take the pill the sunday. whether I was still on my period, or if it was the first Sunday since I got my period she told me to start then. but now that I'm reading more on the pills I'm starting to worry if I shouldve taken it the first day I got my period. did I mess it up? please help.