Bloody mucus in poo? (Baby poo pics)

BB

There appears to be some bloody mucus in my 16 week old LO’s diaper today. And it has a lot more mucus in it than usual. He’s exclusively fed breast milk, both from the breast and bottle.

I can’t see any source of external bleeding...

FTM a little panicky here... Er visit NOW, or wait for my clinical pediatrician to be back on Monday? (It’s Friday night right now)