My second PT appointment was yesterday. Unfortunately, it sounds very likely that a disc is to blame for my problems. My PT has ruled out Piriformis Syndrome because I fail the Slump Test. When I extend my left leg and drop my chin to my chest, I get very strong shooting pain in my left leg/hip. Apparently, the test does not bother those who have Piriformis Syndrome. Plus, when I look at the symptoms of a disc problem, it sounds just like me and what I have experienced over the past 5 years. I would say I am now at the Grade II stage. The good thing is that I have been able to ride my bike overall. I can live with this, annoying as it may be, as long as I am able to be active and do what I want to do.