In general, blood found on a tampon is treated stringently (comparable to a bedikah), since it was found internally. However, not all shades of blood are problematic – just as a brown stain on a bedikah may be acceptable, so too a a brown stain on a tampon may not invalidate the clean days. Alternatively, it is possible that you had a wound which caused the bleeding – in which case the blood you found was not dam niddah and did not invalidate the clean days.

A child conceived while the mother is niddah has a status of a ben niddah. This is is strictly a spiritual status (which itself is a somewhat unclear concept) and has no halachic or practical ramifications. However, in this situation, there is doubt whether you were niddah d’oraita at the time of conception, and therefore it is not clear that your daughter actually has the status of a ben niddah.

Guilt can be crippling if you dwell on an incident and replay it in your mind for years on end. But it can also be a positive force if you use it to change and improve yourself. Focus your energies on being a great mother to your daughter. Spend more time reviewing the laws of niddah so you can become more confident in practicing these laws. When we learn from our mistakes we grow into better people.

Please feel free to get back to us with any further questions.

B’Hatzlacha!