My dog ate a tampon (not the string just he cotton) what should I do? Should I be worried?

was it one that he got ahold of in your room if he was chocking from it or had a reaction to the eating it i think he or she would have had problems by now i would think worse senario is he might have it come out when he relieved himself thats the time i would think when it would happen if it was going to create any additional problems i think it would have happened by now