Hi Doctor.im 25yrs Of Age.ive Pcos Too.my Cycles Were Irregular.so

Hi doctor.im 25yrs of age.ive pcos too.my cycles were irregular.so my gyn put me on metformins 500sr.last month she put me on femilon.i stopped femilon on 19th april and got my period on 23rd april..jus like my normal one..later on may 08th(around 15th day of cycle) i started bleeding..not heavy and not like my normal period..bleeding comes and goes..but this has been happening for 3days..is this femilon effect or ovulation?