I have a Fender MIM jazz, and never made any setup changes until last night. Until yesterday, the action has been perfect. However I noticed the E string was getting terrible fret buzz past the 6th fret, so I went and raised the action a bit. No problems. A few hours later, I noticed more fret buzz on the E. I raised the action again and stopped playing for the night. Today my bass was fine. However, after about 20 minutes of playing, the E string was buzzing once again. I adjusted the action for a third time, but it got screwed up within half an hour. I have had no problems with any of the other strings. Could there be a problem with the bridge or saddle? And will I be able to fix this by myself, or will I have to shell out money for a professional to do it?