Metronidazole and diarrhea

I was prescribed Metronidazole for associated antibiotic diarrhea. For the first 5 days I had no side effect. On day 6 I started to feel fatigue and this symptom would seem to come in waves. It seems to increase this symptom as the days progressed. Now Im on Day 8 and feeling just completely out of it. Like i haven't slept or sort of a drunk feeling. I have to say that I have never experienced any side effects from prescription medication before so this is the first. I can't wait to get done with this. I just want to be back to my same self.

I started taking this medication on a Tuesday... by Friday I started to notice a ringing in my ears.. I also had dark colored urine..and a metallic taste in my mouth. I stopped taking the medication because I couldn't stand the ringing in my ears.... it has been almost 1 week since I stopped.... my urine color is normal.. but the ringing in my ears is still there and I now have diarrhea. I can't handle the ringing anymore.... how long should side effects last once the meds are done????????? Also, after reading some of the other notes, I too had a pain/soreness in my back.

headaches, drowsiness..diarrhea after drinking alcohol and dizziness ..all the while feeling unable to concentrate..foggy sort of