Beetroot or blood in stool ?

Hi I ate beetroot 3 days ago and my stools are redish-pink, but this washes off - sorry for saying that but I had to see if the colour would wash off - and stool is left brown. The colour on the tissue containing the stool was an unnatural colour pink and didn't stay looking like blood but when I put a miniscule amount of real blood on the same tissue - from a thumb prick - it stayed pink and blood-looking. I am so worried as I ate the beetroot 3 days ago so surely it would have gone out of my system by now??