Lately i have noticed something in the corner of the back of my throat. I went to the mirror to see what it was and i found two holes, one on each side in the back of my throat. The one side has two holes and the other just one. I also noticed the one side will collect food and stuff inside it and when i rub my tongue against it it will come loose and a little peice of white comes out. I am very nervous to know what this is about. Is this normal??

I also found out when your open your mouth wide and breath out really hard the holes open up so you can see them alot better.