"i switched to ocella after taking yaz for 3months. i have pcos as well. ocella worked wonderfully in clearing my skin, and it gave me a 7-day period (instead of the constant flow). that was a relief. but, i had bad side effects that caused me to ask for a change in medication after 3 or 4 months using it. i didn&#039;t realize they were connected to birth control at first, but now it&#039;s obvious with timing. i get debilitating migraine headaches during the first few days of the placebo week (from hormone drop), and the week before my period i have severe constipation, which affects my body image (i feel unattractive). it also has me very depressed a week before, too. and this last month, i started spotting 2 weeks in."