I have recently tried to not take them because worried that I was getting a false sense of security to make sure I wasn't making back worse, but when I dont take it seems like I can't get going and when I do by lunch I have severe headaches, and at night can't sleep and have major body aches, doc says is normal, but as I read all the posts no one seems to mention any of this, can someone explain and have I been taking these so long that if I were to stop taking am I going to go through bad withdrawals thx