Thanks for all your help. I did check my bobbin and the tension was a little tight so I loosened it a bit (messing with the upper tension didn't help) and it seems to be better now. I also oiled the crap out of the machine and then let it set for a day. I'm confident that that will help also. Again, thanks for all your help. I did everything that everyone suggested including going to a larger size needle(from 11 to 14). I'll let you know if it works.