hi, since you are a virgin there is not really any need for you to have a pap test. doctors do not like to do pap tests or transvaginal ultrasounds on virgins as it will hurt, being a virgin. of course these tests will do damage because they are shoving something in there. it hurt me and i am not a virgin.a transvaginal scope/probe is quite large being the same size as an average penis. i have had this done. i also have PCOS with a milky liquid substance/discharge. a normal ultrasound showed that i have PCOS so i do not know why they wanted me to also have the TV ultrasound. the gynocologist did not want to do anything about the PCOS because there is nothing really that can be done for it and the pain was normal for PCOS. i just put up with pain.
No test can effect your virginity, and the most he will do is give you a pap smear and a pelive exma or an ultra sound. I think you will be okay and don't be scared. the discharge sounds like ovulation discharge every woman gets it but some woman don't pay it any mind. Good luck and hang in there every thing will be okay.