Is a girl considered to have lost her virginity if she experiences bleeding and a burning sensation during urination as a result of vigorously scratching her genital area with long fingernails, and is it obligatory to inform her suitor about this?

Do not tell your husband what happened, lest Satan instill doubts in his mind. Do not go to the doctor, for that involves revealing your private parts without necessity, and there is no benefit to be gained from it; in fact, it might cause you anxiety. Your silence is not deception, and if your husband asks you about the reason for the loss of virginity (assuming it is lost), you can then be frank with him.