I was reading a teacher's manual and it said for the teacher to walk around while giving dictation to observe the students. This would allow the teacher to see if there is any correction a student may need. You can do this for yourself.
I'm just giving some ideas, you might have more and feel free to offer then.
If you can, have someone video tape you a few seconds to 10 seconds in front, left side, back and right side. If not, try some at different angles of your camera or cell phone. If you have a tripod or can make one up (I saw a wire hanger for a tripod), maybe a selfie stick or just stacked on books or pillows.
Are you getting the page ready to flip to a new page? Read the Beginning Dictation for ideas and techniques.
Are you in a cramped position? Do you hold your pen too tight? Does your arm move too much? Do you see yourself hesitate on words you didn't think you did? Does your hand barely lift the pen off the paper when writing?
As you can tell, a little visual image might help you.
"Gregg Shorthand had achieved the most extraordinary success ever attained by any system in the history of shorthand." John Robert Gregg, 1922