ALMOST FULL DAY TAMPON

Gi
I am freaking out and have never done this before 
But it's the end of my period and yesterday I put in a tampon at some point and I JUST REMEMBERED .
I have no symptoms (except now that I took it out and discovered it, I am freaking out). 
I can't go to the doctors right now but by chance I have a gyno appointment Friday!! 
Will I be okay???