I should also say that he went in and out of the house as usual, wasn't off his food or water or anything like that. I know that can have nothing to do with it, but I thought if he'd have been developing an infection in his paw/leg that would have put him off.
I'm wondering if it isn't her paw but actually the limb itself. She could have had an awkward jump somewhere and strained a muscle - or even had a small run in with a car if you have any round near you?
My instinct is always to head to the vet if a symptom persists because cats soldier on through injuries so defiantly - but in light of her progress, I think you're probably safe enough to monitor her closely for another day and see if it sorts itself by tomorrow. Some of the vets who post here may see your thread and advise.
Oh that sounds pretty identical to how my cat is behaving.
She will let us touch it now, if she is in the mood. Tbh she's never overly keen on having her paws touched any way. I did manage to stroke her paw, and get a good look at the bad and I can't see anything wrong at all. She is licking it as normal, and using it to wash herself too.
My cat started limping the week before last for no reason. But he let me touch it gently and had no trouble jumping on/off furniture or leaning his full weight on both paws and kneading me (not sure what you'd call it!).
We left it but kept checking and it resolved itself after 4/5 days. If he hadn't have let me touch it or obviously couldn't use his paw then I'd have taken him to the vet straight away. Still not sure what caused it though