Help kidney stones!

A year ago I had a ultrasound and the doctor found a high reflective 5mm structure in the left kidney, but the doctor didn't prescribe me anything just told me to drink Apple cider Olive oil and drink cranberry juice or take cranberry pills. I thought I didn't have them any more but lately I have been having back pain. It doesn't burn when I pee it doesn't smell bad but my pee is cloudy and sometimes it looks red yellow... what should I do? *Go get checked with a different doctor?

*can the structure have grown?

*is a 5 mm structure bad?

Please help!

By the way I drink a lot of water all the time!