Levaquin and high heart rate

The first night I started levaquin I had difficulty sleeping and woke up in a panic @ 2am. The second night I slept only 2 hours of which was restless sleep. I have had several episodes of tachycardia (high heart rate), just pounding! I have felt uneasy and anxious as well. My teeth and joints are sore. However, despite all this discomfort, my sinus infection is clearing. The pharmacist doesn't seem concerned, however I am calling my physician in the morning. I suppose this is simply the antibiotic battling the infection. I feel worse on the medication!
By the way -this is the 5 day 750mg pack. Thanks, Dana