Where is my hymen?

Patient: I am a virgin, that means no sexual intercourse, I will get married and in my country hymen=virginity, no hymen = divorced…. so I checked my vagina and I dont know where is my hymen, inside my labia there is a white fold of membrane with a small central hole and when i get horny or something it is enlarged, so is that my hymen???? I cant find actual photos online and i cant see a doctor so please help me