Gah, I'm so embarrassed 😳.
Went to bathroom and removed tampon. Wrapped in tissue so as not to flush, meant to put straight into the bathroom bin but realised that someone had emptied it and not put a new liner in. Went to find a bin liner and got intercepted by numerous small children and forgot and left it on the shelf
!
I've just nipped back in a couple of hours later and discovered it. And I have guests! I've name changed because I'm so embarrassed to leave a bloody mess in the bathroom, and for being such a scruff 
.
I just had to share the horror before facing the rest of the day!