I am 28 years old and have been getting hormonal cystic acne on the chin for over 10 years. I've gone to a dermatologist 2 years ago and was prescribed the Epiduo cream but that doesn't work. The cyst remains in size and lasts a the same amount of time without the cream. Please let me know what I may recommend to the doctor to prescribe for me that will actually work. I'm almost on the verge of giving up. Thank you in advance!