I am going to assume provisionally that you do not mind answers from people other than Alicorn.

Situations that have probably caused me to become less aware of the true reasons for my thoughts and actions:

• needing to stand up for myself, i.e., to argue on my own behalf, in what a friend of mine referred to as a "pecking situation," i.e., one where ordinary people without a strong commitment to epistemic purity constantly try to one-up me and each other;

• needing to sell myself, e.g., in a long series of job interviews or dates;

• living for months with chronic pain;

• getting older (I am 49);

• being very afraid

(end of list).

The changes I found myself required to make to myself over the months and years to become marginally competent in the "pecking situation" almost certainly interfered with my self-awareness though I never despaired of my eventually regaining the self-awareness with enough work.

Something caused me to pay much less attention to my felt sense and my moment-to-moment emotional reactions, and my having lived for years with chronic pain is one of the most likely causes.