How can you tell if you have Lost tampon inside ?

BREEZO
WELL I'M NOT SURE IF THE TAMPON IS OUT OR STILL INSIDE OF ME I POOPED AND STUCK MY FINGER INSIDE TO FEEL FOR THE STRING I PUSHED BUT STILL NO SIGN OF THE TAMPON .DO YOU THINK IT COULD STILL BE UP THERE (INSIDE OF MY VAGINA) AND IF SO HOW LONG DO YOU THINK A TAMPON WOULD STAY INSIDE???...