I have a 9 year old Weimaraner with a swollen toe?

Okay so I have a weim. She's healthy.. I noticed her limping a few weeks ago and took her to the vet. I was thinking it was because of a fatty tumor she has next to that leg. The veg checked out her paw the tumor and thought she was alright. That it was likely just a strain of something..

Today i notice she's licking at the paw a lot. I take a closer look at the paw and one of her toes is very swollen. It's redish pink raw (i'd assume from the licking). She's fairly happy and normal not really limping.. But it's so swollen it's almost bulging over the nail not completely hiding the nial.. But there is a bit of a bulge.

Should I take her to the emergency vet tomorrow? Or do you think I can wait until monday? Any ideas what might be the cause? I looked checked for splinters couldn't spot any..