Hi I Have A Cyst On My Face That Will

Hi i have a cyst on my face that will not go away. over the past year, i have been prescribed 5 different antibiotics, and 4 different types of creams. I have tried tea tree oil and just yesterday I bought witchhazel. hot compresses do not work on this cyst, nothing comes out of it. I've seen 7 doctors, and not one is testing my blood or anything thinking this is only a vanity issue. I've also been very lethargic and sickly feeling. Can you tell me what I need to tell a doctor to take me seriously?