Acne w/ the pill

I’ve been on Syeda for about 4 months now and regardless of the brand- how long did t take anyone else to noticed a difference with their acne or like oiliness w the pill? My derm said the pill would help clear up my skin (kinda has) and help w my oiliness. It hasn’t done as big a job as I want it to. I’m sill pretty oily and unlike before I was on the pill every time I get my period I break out consistently.

Any suggestions?