I too am at my wits end. I tried to take it out myself but couldnt find the strings and am also scared. I would change doctors immediately. You are in charge of your body not him. I remember asking the nurse practitioner specifically if thing causes cysts (i have had problems in the past) and she looked at me like I was crazy. She told me that she never heard that and if anything they protected against it! HA was she wrong. The mirena manufacturers themself say so. Trust your gut, Doctors dont know it all do what is right and I would switch right away. I wouldnt want a doctor who doesnt respect my decision. Good Luck!