Dog’s sprained leg

So earlier, I went outside and came back in only to see my dog just sitting there in the corner. When he finally got up to walk his front paw was raised in the air and seemed hurt.. He wouldn’t walk on it at first, but now he’s running, jumping on the couch and going up and down the stairs, but there still seems to be pain there, and he still raises it in the air.. I made an appointment with the vet for the next available appt, but do you think I should wait, because it seems to get better as time goes by.. What’s your opinion?

He’s a 1yr old Bichon Frise.