I had my first appointment recently. Basically I just explained my situation to him. He sent me for blood test namely an std screen (hiv, hep, etc), plus rubella antibodies, hormones and to check that if I was ovulating. Then when the results of the blood tests came back (I had too much testosterone) he sent me for a pelvic ultrasound to check for PCOS (which as you mentioned included a transvaginal ultrasound).