Clenched teeth symptoms and conditions

I was just prescribed Levaquin for a sinus infection/bronchitis. I am a healthy 36 year old who is not currently taking any medications. I got the Leva-pac, 5 days, 750 mg. each. The first night I slept fitfully, but was still feeling the infection, so blamed it on that. The second night, however, was HORRIBLE. Although my sinus symptoms were markedly better, I literally thought I was going to have a heart attack during the night. I had severe insomnia...only slept 20 minutes total from 9 p.m. to 7 a.m., and in those 20 minutes I had a horrible nightmare/panic attack, jaring me awake with clenched teeth, profuse sweating and feeling as though I was choking. I was overly anxious, paranoid and had severe leg cramps. My heart was racing and I would alternate between being overly hot and then overly cold in a matter of minutes. It was an experience I never want to have again. My husband insisted I stop the antibiotic even though that is what you should never do with an antibiotic. Even though I have been off two days now, I am still feeling some of the effects, especially at night.

I'd rather have allergies than take this medication again. Actually, I'm going to appeal for an Rx for Allegra, which gave me no problem.
The side eeks from Singulair I experienced were: clenched teeth, hard time falling asleep, racing thoughts, awful body aches, hard time waking up and a feeling of general malaise.
I'm sure this drug works miracles for some folks, but for me? I'd rather sneeze and drip.