Blood found on a
sponge, like that found on a
bedikah cloth, is treated stringently because the sponge was inserted internally.
Therefore, you may not rely on your doctor's statement from a few weeks ago that she saw cervical bleeding. You need to return to your doctor or a
bodeket taharah ("
niddah nurse") to be examined. If a cervical/vaginal
wound or irritation is found, you may attribute the blood on the sponge to that source. If there is no visible wound or irritation, unfortunately you would be rendered
niddah from the blood you found. You would need to wait
the minimum days, perform a hefsek taharah, count the
seven clean days, and immerse in the mikveh.
You are not required to look for any staining on the sponge when you remove it. Therefore, in the future, best not to look at the sponge when you remove it. Discard it immediately, and wash your hands right away without looking.
Please feel free to get back to us with any further questions.