Did you check your sex hormone levels in hospital?

As far as I know, birth control pills are used to control acnes which are caused by high male hormone in women.

Maybe your sex hormone levels are normal. My personal suggestion is that going to hospital and ask the doctors if Isotretinoin will suit for your condition. I heard that doctors in USA try to avoid 'Isotretinoin' in acne treatment, for its notorious side effect. However, doctors in China will use 'Isotretinoin' and try to avoid birth control pills. For my personal experience, the side effects of birth control pills are much more awful than Isotretinoin.   

"避孕药如果吃的话最好长期吃"

In my idea, keep avoiding taking any drugs for long time. Birth control pills contain hormones, keep away from it.

我是挺早以前在国内吃的异维A酸，治痘痘的，在上海的华山医院开的，因为我的痘痘挺严重。那时候医生就是叮嘱要保湿，所以买了个润唇膏，其它没什么了。我听说是这样的，国内治痘痘，一开始都是异维A酸，很严重了才上避孕药。而美国这里一开始是避孕药，很严重了才是A酸。我个人是不主张避孕药的，我以前吃过，是为了别的病。吃了浑身不舒服，后来还是停服了。

既然lz吃避孕药反倒长痘痘，应该先停药。反正现在是夏天了，lz多喝点绿豆薏仁汤，去湿去火。从中医来说痘痘还是火气湿气大的。还有，少吃甜食，包括蛋糕冰激淋。早睡觉。还有，洗脸的毛巾可以放在锅里好好煮一下，消消毒。lz是否喜欢捂着被子或者脸贴在枕头上睡觉，那么也勤洗被套枕套。

还有两个很管用的土方。lz找得到新鲜的橄榄吗，如果有的话，每天吃个几颗，越多越好。虽然味道很涩，但是治痘痘那简直是立竿见影，不管多严重的痘痘。还有，如果lz皮肤对芦荟不过敏的话，把新鲜的芦荟叶子剖开，用叶面和果肉间的黄色汁液全脸和痘痘处擦，效果也很好。