tumor/ large lump

Question
Just today I discovered a large lump beside my rat's right leg. It doesn't seem to be causing her pain, but it seems to have appeared out of nowhere. Also, sometimes her pee is brown or pink and she has been getting small scabs around on her chin and behind her ears.
I want to take her to the vet, but I don't have a lot of money and I don't know if there's vets around her that would even look at a rat.
Her name's Babey, she's albino and about a year and a half old.
I love her so much and would be devasted if she died.
Please help I'm really worried!

Answer
The only thing I can suggest at this point is that you really need to get her to a vet. The lump is a benign mammary tumor, the discoloration of her urine could be a bladder infection which will require antibiotics, and the scabs could be mites or too much protein in her diet, all of which need a confirmed diagnosis before I could suggest any other help.