The onus is on you to cooperate with the trail to disprove the allegation but unless and until they move an application in the court for your medical examination, you need not worry.
And also remember that losing hymen is not losing virginity and also there is going to be long gap between the consummation and the medical tests there is no chance for finding any trace of your semen in her v**gina, so absolutely there is no use in sending her to any medical examination unless that consummation made her concieve.