Metronidazole and cup of coffee

I've taken Metronidazole three times/day for two weeks for a foot infection. The metallic taste and nausea appeared after 7 days. Now it's horrible... every single meal that I've had since I've been taking the pills now gives me nausea, so I can't eat. Today I had a cup of coffee and it has been the most horrible experience (nausea, vomit, headache). I've felt really tired, I can't work, because of the nausea and fatigue. I'm done... will not continue taking my pills any more! DO NOT DRINK COFFEE IF YOU'RE ON METRONIDAZOLE!

I've only taken three pills so far and am experiencing a lot of lower back pain. My prescription is one pill twice a day for seven days. I couldn't eat my dinner last night. I also had HALF of a cup of coffee this morning and was wound up for at least four hours. I felt like swearing off caffeine for the rest of my life. What a terrible feeling. If you feel jittery on this medication... DO NOT drink coffee!