I recently picked up my bass again after not playing it for about three weeks. (I was on vacation). I noticed that the strings were noticeably closer to the fingerboard. Unless I play incredibly lightly, I get a horrible buzzing in first position, (which is probobly where I play half the time). What whould I do about this? It seems like a fairly normal thing to happen, but I just don't know how to fix the problem without doing something drastic. I'm used to dealing with my electric basses. Clearly the upright doesn't have a truss rod, and unfortunately my bridge is non adjustable.