For a few years, I have been entertaining a feeling of fear in my abdomen. Sometimes it is burning like a fire inside that prevents me to sleep. This is not something temporary, but something that I have been dealing with for a few years. The first time it happened was during my first panic attack. Even if I don't have panic attacks now, I noticed that this feeling sometimes becomes stronger when I deal with people who show strong emotions like anger, jealousy, bitterness (toxic stuff in general), or when I want to go fast to attain my goals, or when I watch porn. I also had this feeling one time when watching a TV show and when the character was in a difficult situation. I don't really know how to let it go. What would be general steps, things to check, and/or to explore?