I just got diagnose of having an minor injury in my spinal vertebrae due to a disc herniation. A nerve called sciatica is being compressed between two of my discs, this is causing a little discomfort in my right leg, specially and unfortunatelly when I'm biking. I am currently in physical therapy and don't like the idea of being unable to cycle. So I gave it a shot last week and the usual pain in my right leg came back just a few minutes after being in the saddle. So, I am figuring out that maybe the lentgh in my stem is not adequate and causing my back to "over-arched". Do you have any advise how to fit my bike a little better with the main of objective of minimize my pain???.