SLP graduate student chiming in here. First things first, please listen to the other replies and stop jerking your head. It is a secondary behavior and it will only make it WORSE. How do you stop the behavior? The best approach is to have a good support system and to find a SLP who is a stuttering/fluency specialist. Don't just go to any SLP, go to one that is CERTIFIED. I can tell you as someone that has gone through one of the more rigorous SLP programs in the US, I still only had one course on fluency. That is really not enough knowledge to make me be an effective therapist. I am lucky because my director is one of the top fluency specialists in the world right now, but most SLPs did not get such a luxury. A good SLP will help you work out all of the extra issues that go along with stuttering. In my experience with patients, stuttering is 90% emotions and 10% fluency. By that I mean stuttering as a whole, it is not just the actual act of stuttering, but it is also how you feel, how you act and how you are viewed. A good SLP will help you choose between the two methods of therapy.One is called fluency shaping, and the other is called fluency modification. One involves techniques to make you more fluent by managing relaxation, muscle movement and airflow. The other does not seek to eliminate stuttering at all, but rather is "fluent stuttering". It deals with peeling off all the extra layers that goes along with stuttering. As you can imaging, it's probably very very emotionally draining to go through the latter, but the results speak for themselves. I personally like to use a blend of the two therapies with my clients, and so far they have had amazing success. Each person is different so your therapy will need to fit who you are. There is honestly SO MUCH incorrect information out there about stuttering. it's almost unnerving. Please make sure you find someone that can help you. It will not be an easy fix, but with some support you can get through it. PM me if you have questions! TLDR Stop the secondaries and find yourself someone to help. You will thank yourself.