Levaquin and mind races

I just had to post after reading what everyone else has gone through being on Levaquin. I started it on Friday and after the 3rd dose I wasn't able to sleep at night. I have been getting maybe 3 hrs a night if that. Then yesterday I starting experiencing abdominal/intestinal cramps, diaria, I have lower back pain and my mind races as times. Also, my knees are hurting really bad and hurts to stand up. I didn't take my dose today and I won't. I have thrown the medicine away. I do hope i don't suffer long term since i've only taken 6 doses.