What if I broke my own foot because my mother didn't believe me that it hurt?
Why did you mother not believe that your foot hurt?
My mother ignored me a lot, probably because I'd been born under the Chinese year of the goat.
You shouldn't break your own foot and willingly injure yourself in order to prove a point to someone else. Breaking a foot requires a lot of medical care and expensive treatment and should be avoided.
How else will I get her to pay attention to me?
I'm sorry that you were ignored by your mother, however, it's wrong to injure yourself just for her attention. This is only going to cause her more grief and trouble. Do positive things to get her attention instead.