I went throught the same thing for years! No one could figure out what was wrong...i was always in pain..sharp pain, dull pain, you name it I had it,also very tired all the time..i was taking pretty much all the same pills as you. Plus physical theapy. The way they found out it was infdction was an absess at the site of insion. I had it drained and packed. Then the drained site wouldnt heal bc a cyst was protruting out of the drainage insision. They still didnt know untill I went to get the cyst removed at the UofM in michigan. They found my surgen that prformed my surgery at the UofM and she came down to see me...looked right at it and poked around..and said you need those rods out now, they are infected. Then a day later I had to have my hardware removal surgery.

Also I was tested for infection 1 yr. Before and they never found anything...but the infextion was indeed there, they said for a few years. When they took out the rods they were all eaten up by the infection.