I was student teaching for some months, and while coming up with lesson plans and grading, the bass suffered. The student teaching came to an end, and I grabbed the bass and played it like never before. I got at least 2-3 hours of playing time, every day. That might be normal for others, but that is not normal for me. So.... I was having a great time, and then I noticed that the tips of my pinky and ring finger on my left hand are feeling like they're always asleep. I have to try and shake them awake at nights...that's when I noticed the problem, actually. WHAT have I done to my left hand? I thought that I was using OK technique. This has been going on for a couple of weeks! HELP!!!