My washer machine will not agitate? It will fill up, but will not drain, or agitate. I had a tablecloth in the washer machine on small load. When I went to get it out. It had not finished the cycle. Just cut off in the middle I guess??? So I pulled the button out to finish it. A few minutes later I heard it off balance. Then I open it made sure it was balanced, and started it again. It finished. Since then it has not worked???