My dog might have cancer 🙁

Hi all... I am on here to seek some support and to see if anyone has had the same issue. So my dog got something stuck in her foot a while ago and ever since then she started having growths on her foot. There seems to be more and more since a month a go. We have obviously taken her to the vet and antibiotics didn’t work. It is possibly cancer. She had got blood tests done and they came back inconclusive. There were no white blood cells so they said to do a biopsy which I presume costs a tone... not sure what to do. She is still happy and energetic as. She’s her normal self, eating and drinking. She licks occasionally at her foot so it is annoying her. She has been given pain relief. The biggest one had burst and bleed but hasn’t since then. There is also two big lymph nodes on her paw and one now on her upper leg... :( I have done some research and read that it could be indegital cysts. Let me know if you know what it could be!? Or what I could do to help her!!!?