How Can Excessive Vaginal Discharge Caused By Cilest Be Treated?

hello. i have a problem with my pill.im on cilest and its causing me to have excessive discharge.i really dont want to have to change my pill coz apart from that the pill is fine.i know its the pill causing it coz i had to come off it a while ago for a month.due to antibiotics.and i was discharge free.im worried going onto another pill like microgynon 30 will cause the same problem.also i was on microgynon first about 6 years ago for a yr.im not sure why my doc changed me to this pill.cilest has also given me fuller breasts which im happy about and im worried that changing pill will change that.