Hello
As you mentioned that you are having sporadic / unpredictable period .
You are having pcos ( Poly Cystic Ovarian Syndrome ) but according to you , you are not having obesity or excessive hairs growth .
It is not necessary that all patients have hairs growth or obesity .
Dysfunctional uterine bleeding /irregular bleeding / scanty /amenorreha ,
ultrasound findings shows atretric follicles with increased ovarian stroma .
Androgen excess also present.
I mentioned all these symptoms , so that you can understand that ,it is not necessary that all symptoms or signs present in all patients with pcos.
Cysts are often caused by
hormonal imbalance .
Using BIRTH CONTROL PILLS and
metformin can sometimes help regulate hormone levels so that cysts can be taken care of.
This is not necessary that all the time gynae use low or high dose of
estrogen but a balanced dose is important.
So your gynae will decide low or high dose .
The irregular bleeding with brown discharge may be due to hormonal imbalance .
So consult your gynae and get his opinion about evra ( 2nd opinion).
In my opinion take complete treatment for pcos and you will get complete relief.
Good luck.