Suggest Medication To Shrink Ovarian Cyst

I am 32 years of age 162cm and weighing 72kgs. I have functional ovarian cyst 9cm and just enquiring whether susten pills are natural progestrone and whether they can help in shrinking the cyst. On another note, can yasmin contraceptives help in shrinking this cyst. I am currently on yasmin for the last 2-months but looking for other alternative medication in case the cyst does not shrink by 3rd month. thanks for your answers. God bless.