Three years ago I was prescribed Levaquin for an infection. After...

Three years ago I was prescribed Levaquin for an infection. After the Levaquin I was unable to stay up in my wheelchair for more than two hours. I started taking two extra strength Tylenol and I was able to increase that to three hours. I added Naproxen 325 mg and that has decreased the pain and has also increased the time in my wheelchair by about an hour. I am also on a drug called Lyrica 150 mg which has decreased the pain further. I am a quadriplegic so I cannot feel anything below my shoulders but my body responds to pain. I can tell that my body is in constant pain but of course I cannot feel were it's coming from. Ever since the Levaquin I also have a condition called Terry's nails. I looked at this condition on the Internet and is says that Terry's nails occurs when the body is in distress usually with kidney disease or liver disease or cancer. I've had more blood tests than I can count and all of them are normal. My body's sensitivity to pain appears to be getting worse. I'm not sure what can help anymore, have any of you found anything out about pain management?