It could be a form of paranioa, anxiety, or ptsd. But, I'm no psychologist. In the moment, when you have a task demanding your attention, this job, or person becomes more important than your own emotional and mental state. But once everything is "okay" you find that what happened did bother you and it affected you deeply, and is still affecting you month, possibly years later. I would suggest seeking a professional psychologist and counseling with them to see if there is a proper diagnosis and treatment plan so you can ease your mind. I'm just a young adult who's had sought counseling to understand my mental health and it has helped me.