Thanks for all the great suggestions! I seem to have got it running sweet as new. I let her take a nap for about an hour and replaced the bobbin. I had just picked up some new bobbins, so that may have been the problem. I always clean the bobbin area every time I change the bobbin. My other needles may be good after all, so I will try them out on some practice quilting after I finish the things I am working on right now. I want to thank everyone for the suggestions.