I consider that you should go to dermatologist
because 4 months it is quite enough to get some improvements. There are, however, other reasons for having acne such as gastrointestinal problems, Demodex
which lives on your skin, Thyroid
disfunction and also quality of water, drinking, smoking. Phytotherapy
, spetial lotions and antibacterial creams should be used. Actually PCOS should be also treated as well. Eat more fruit and vegetables. Avoid much sunlight because it is harmful for your skin and immunity system.
Wish you Good Health
Dr O. Aleksandrov