What your experiencing sounds like secondary behaviors. Those are things such as tension, head jerking, jaw tension, eye blinking, tongue protrusion, etc. Stuttering is variable and since your stutter seems to be at a bumpy spot, the tension build up really impacts how your stutter/block. I am a person who stutters, have been forever, I have found mindfulness to help reduce tension revolving around stuttering. Getting frustrated and upset about the amount of tension only makes it worse. It is a very hard cycle to break and takes a lot of work, but it is doable to manage these secondary characteristics with time and practice AND PATIENCE! I wish you all the best and hope some of that info can help!