Linda,
While journaling can be helpful for organizing thoughts and potentially gaining insight into the way you treat yourself, it is very important that it not become just another task and source of pressure that you use as a catalyst to make yourself feel bad. It is important to focus on exploring the emotion and letting yourself feel it, rather than rushing to write something down. This can actually turn into another form of avoidance: the sense of urgency to organize and write down the feelings and your understanding of them becomes more central to your awareness than actually sitting with and experiencing the feelings themselves. Journaling is not the end point of your journey towards understanding and dealing with TMS, it is simply a tool in your toolkit, should it prove helpful. When some of my clients become too focused on it, I will often tell them to just put down the journal for a bit and stop pressuring themselves. Instead, focus on your feelings in the moment. This fear that you will somehow lose the conceptualization of your experience is simply your bully pulling you out of the moment and projecting your fears into the future. Don't worry about how you can hold on to what you are experiencing; instead focus on that experience and try to remove the pressure and anxiety you are putting on yourself.
This issue can extend beyond simple journaling. I often find my clients taking on their entire treatment process as just one more task that they must fulfill. It is as though the mind is saying "Look just feel this, journal that, look at this and then you will be cured and we can go back to business as usual". There are a few reasons why the symptoms will fail to respond to this kind of mindset. For one, it is putting all the pressure on you! With this mindset, any failure to find full relief or make significant progress is directly tied to the shortcomings of your efforts. The goal here is to lessen the pressure you're feeling, not add to it. Secondly, getting back to "business as usual" is not really viable. This way of treating yourself, the pressure, the anxiety about doing all the steps correctly, is what got you here in the first place.