The mystery deepens.
X-rays are back.
You do have some mild facet arthropathy (this would be similar to saying arthritis) at the L5-S1 level. This is where your lumbar spine meets your sacrum.
In doing some additional research, it seems as if there are some mixed reports on whether or not this could account for the symptoms that you are having.
Some experts say that facet inflammation can cause symptoms in areas below the knee, while others are less convinced. It is certainly not a common reason for distal pain presentations.
Well, I guess it's Advil, time and no training. Despite the discussion in this thread, which reported mild facet arthropathy (among a lot of other disk problems) and a much more serious version of the same symptoms, this seems like an unlikely weightlifting injury. I also found this thread. We'll see, I suppose.