Thanks for the query.
No need to worry, during usage of tampons, doing exercises, cycling etc can lead to tearing of the hymen
to some extent.
Actually hymen is not a completely closed structure it will have small opening.
By using the tampon you may be made in little larger opening. Some of the hymenal tissue will be there even now.
So don't worry. Be little gentle while using tampons in future.
For more details you can ask me through: http://www.healthcaremagic.com/doctors/dr-sree-gouri-sr/63429