I have had stomach upset, extreme fatigue, horrible dreams when i...

I have had stomach upset, extreme fatigue, horrible dreams when i can sleep, sit up most of night cant sleep, also have balance problems, almost fell 4 or 5 times. I thought i had reflux disease, took anti acid pills didnt help, also have a lot of swelling in my legs, despite after taking water pills, and i notice after i take the medication i start getting to feel bad, i was given this medication for a sinus infection, i was given a 14 day supply i have one left lavaquin 500 mil ,