I Have A Kidney Infection And Have Amoxicillin Left Over

I have a kidney infection and have amoxicillin left over from when i had a tooth infection but i know the dosing is different with different illnesses. So i guess i just need to know if i should take 2 500 mg of amoxicillin to start off with then one capsule 3 times a day after the first dose. I dont have money to go to the dr for them to just give me more amoxicillin :/