Symptoms of nervousness symptoms and conditions

I was prescribed Levaquin for a bout of diverticulitis six weeks ago. About a half hour after taking it each morning, I felt completely unwell--dizziness, fatigue, overall weakness, odd sensations of pressure in my head, chest, and bladder, weird bouts of sudden joint pain. The worst side effect was terrible insomnia. I'd go to sleep OK, but wake up after 3 hours and not be able to get back to sleep, sometimes for the rest of the night. Instead of getting the rest I needed to get better, I was getting more and more exhausted. Now, a month after stopping the medication, my sleep hasn't returned to normal. I'm still awake in the middle of the night for two or more hours. Is this a residual side effect from Levaquin? Has anyone else experienced it? When can I expect my sleep to improve? Is there a way to detoxify from this drug?