Newborn diarrhoea?! Advice pls!


I’m unsure if my 1 week old has diarrhoea...he’s formula fed, eating lots like normal, doesn’t have a fever and plenty of wet diapers still. Only changes are that since yesterday he’s actually pooping LESS than he was the first few days after birth but it was super runny and quite a bit for the one or two times he did go. It’s always been a bit more paste like/bitty.

He’s been a bit fussy in the evening too but I think that’s probably normal for babies anyway?!

Any advice would be great, I’m an awful worrier!