Lately I have a had encountered some problems in my zazen. I feel that after a few minutes I need to get up and STOP. It's like my mind needs distraction. For a while my practice has been going very well, but with no changes in my life, I feel that sitting has become a chore. Any help with this? I keep reminding myself to just sit and go back to my breath. It may work for a few minutes, but the feelings come back. Any thoughts are welcome.