Uh.. your insurance company doesn't see results of your lab work. Only your doctor does. Your insurance is not going to get canceled.
Just tell your doctor you use steroids and get your gyno treated. That's what I did. Never had a problem. The only danger in telling your doctor about your steroid use is if you ever have to apply for your own health insurance and they want to see your doctor's records, in which case just say you don't have a doctor.