Hi! Probably isn’t the cause but wanted to just say incase
Is it possible her toe was bitten by an insect or bug? A couple of years ago my old boy Bruce started having issues with his toe swelling, eventually it got to the extent that he had to have it removed.He couldn’t walk on his foot anymore as it was so swollen and painful,he’d been on antibiotics and painkillers and I was
bathing his toe but nothing helped.We worried it was a growth /tumour but turned out to be the mouth/pincers of a super worm that was stuck inside his toe! My Nan had been feeding Bruce while I was away for the weekend and I came home to a few stragglers in his tank but removed them and thought nothing more of it until my vet dissected his amputated toe and found the little pincers from a worm that had bitten his toe and got stuck inside his toe
Hope your girl is doing ok and it starts to get better soon,again it’s probably not the cause but worth mentioning!
Before this my vet did try to get a tissue sample from his toe to test for cancer or any thing else but wasnt able to get a good sample.Maybe ask your vet about this?