Good that you are posting about it. (((((((Clarity))))))))
One thing to think about is that the thoughts you are creating could be distortions. This particular distortion is called catastrophizing. It is one I am very familiar with doing - creating events all in the mind that never happened where I am very ill or something has happened to me or another, or I start thinking about a real event and then follow it down a path that likely would never happen. This distortion (and others) can be found if you Google CBT Thought distortions. There are thought records that I find helpful where you can look at the thought, find the feelings, rate them, see what the evidence is that supports this thought, see what evidence doesn't support the thought, find statements that are more true about the thought/situation and then re-rate your feelings with the new outlook.
Not knowing if you wanted feedback or not, I put that out there as a "here's this if you want it".
Being in the 'noticing' phase is fine, too.
You are supported!