Write down the steps you take internally that lead to the emotion. For example, someone might Think about riding a horse that threw them. When you discover what your sequence is, then you can change any one of the internal steps in order to change the resulting feeling. The resulting final feeling will be one of increased confidence. Talk about your feelings with someone you trust.
Unspoken feelings stay inside and grow.
Spoken feelings, when exposed to the light of day, often change as we literally and metaphorically, are able to see them in a new light. Staying balanced in the saddle is a process which requires a flexible approach, and ongoing changes in the aids you give your horse. Staying balanced emotionally is also a process requiring a flexible, open, accepting attitude to yourself, your experiences, and your ability to change. I challenge you to be as patient and caring with yourself as you most likely are with your horse.