Metronidazole and meds

I started taking the Metronidazole (prescribed 1 tablet, 2x/day) 500 mg. After three days, I experienced fatigue, headaches, which got worse. By Friday, I had to leave work, and I was in bed w/flu-like symptoms: my head felt like it was to blow off, nausea, and hollow back pain in lower. I had to stop taking the meds. All symptoms subsided within one day, except my back hurts when I walk, and the headaches are infrequent but still remain. I called to report to my doctor. The nurse said that she had not heard of anyone having side effects from the drug.

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.

One week ago tomorrow, I was diagnosed with BOTH a yeast infection (my first) and a bacterial infection. The doctor gave me the generic forms of Diflucan and Flagyl. I think this medication is interfering with my sleeping. I've been taking 500 mg 2x/day for a vaginal infection and I can't sleep at night. I take the pill between 7-9am and 7-9pm and since I've started, the only night I was able to get any sleep was the night I took some Benadryl. To boot, I'm STILL having problems with vaginal itching and I don't think the Metronidazole has helped my infection at all. ARGH!!!