pink oval piece in my feces

I easily picked this out with a spoon. I've been noticing some pink pieces in my feces recently and i'm wondering if it's ecoli related, from undigested food like cranberries, or some type of other organ related thing that I need to get checked out. it seems my eating cranberrys is coinciding with eating meat and it's not in my bowels all the time so i'm not sure when to schedule a doctors visit or if it would help. but it's starting to worry me as the amount of cranberrys I ate yesterday seemed insignifigant. I took a bite of a medium or rare hamburger my parents made. I recently developed prostasis though and think my body might be not digesting meat properly... IS IT SOMETHING ELSE OTHER THAN CRANBERRYS OR E COLI THAT I SHOULD GET CHECKED OUT THOUGH? SHOULD I STAY AWAY FROM FOODS OTHER THAN MEAT??

any help would be appreciated. if it happens again i'm definitely going to schedule a doctors appointment. but i'd like to stop worrying in the mean tie...

pink oval piece in my feces