I just spent £350 on a fender jazz bass. It played perfectly fine and sounded great. But yesterday I dropped it on the floor and now the lowest 2 strings, particularly the second lowest sound a bit muted have almost no sustain . The second one is also probably a bit quieter than it should be. I'm pretty much a beginner so I don't really know what could be wrong. Can anyone tell me what the problem might be and if there's anything I can do about it?