Wow, 20 minutes, that is absolutely awesome. Tms sure can be tricky, showing up at different places like that all the time.
My pain comes and goes all day long, moving about from one side of my neck to the other. I just go about my day, exercising, working, taking care of my family and so on. When the pain gets really bad, I take a time out to reconnect with myself or I do something I enjoy like watch my favourite TV show or call a friend. what I don't do anymore is worry too much about it, because I know that eventually it will disappear altogether. I took me a while to develop this problem so it makes sense that it should take a while to get better.
Dr. Sarno says to resume your activities to convince yourself that the pain is not structural and it sounds to me like you're doing just that. Great job!