I've Been Taking Macrobid 100mg 2 Times A Day For

I've been taking Macrobid 100mg 2 times a day for 7 days for a kidney and UTI... I was given the wrong antibo. for the first 2 days before the dr received the lab results back. When I returned to the dr Tuesday afternoon to take another urine test, I still have an infection... and was given the same meds for another week, and was told I may have kidney stones... I'm a female 51, and am in extrem. pain! The lower left/upper back is still hurting... it hurts to sit, stand, walk, anything,... she just said to see if I pass a stone and drink a lot of water... does that sound ok?