What Are The Chances Of Losing Hymen In A Transvaginal Exam?

my question is i am a virgin girl who never had sex before so next week i hav a w/ transvaginal exam so i am very much worried cos is there a probability to lose my hymen? and is it painfull? yesterday when my doctor wants me to give a pelvic exam by inserting his finger, i couldn't doit cos it was very much painfull