God did not instruct that women could be stoned if they did not have proof of virginity. If God was really the Creator and God had anything to do with the Bible, God would know that a bloody cloth is not proof that a woman is either a virgin or a harlot. A bloody sheet or the lack of it proves nothing at all regarding a womans sexual history or morality-even if one wanted to argue that having had sex makes one not a virgin and therefore impure, 25% of women are sexually abused-I doubt it was lot different thousands of years ago and therefore, a girl could have had her hymen "compromised" and not even KNOW it. She would be an innocent, still. (See Deut. 22)
No just or true God would use this man made judgement to declare a woman an immoral harlot and stone her.
A truly ignorant man came up with that one. Not the all knowing creator of the universe and women!
So, don't worry about what the Bible is saying to condemn you or scare you.