I don't think you need to worry about pregnancy since you are having your period. As for other concerns, the main one would be infection which sometimes comes from a foreign object left in the vagina. But, since you have apparently not had symptoms of that (foul odor, discharge, fever, chills, etc.) I would say you are fine.
The answers in online forums are for information only and are not intended to substitute for medical advice and care. Please see your personal health care provider for further evaluation of your individual case.
Debbie Miller, RN