Hey, sorry to hear about your accident with Jester, I can see how that would affect the way you look at riding.
Treat yourself like you would any horse that has lost confidence - build yourself up slowly and surely, humans are mentally conditioned just like horses exept we're likely to be much more unforgiving towards ourselves. Also, just like horses, we tend to remember one bad experience much more vividly than 100 good experiences and that is how both people and horses can lose confidence overnight. Start off with the things you find most enjoyable and the least challenging and move up from there. Don't be embarrassed to ride in a round yard on a lunge line, like a beginner! (I know I do when I jump on someone elses horse for the first time, makes me feel more secure until I can suss out how I feel about the horse and what they might do). Even though you are more of an experienced rider, if it helps you feel more confident, do it! If there is one thing horses can sense, it's fear and they react to it very strongly because they look to us, the rider, for guidance and reassurance.
Also, don't be so hard on yourself - beating yourself up won't help you (or Jester!). Think about what you would do if a horse suddenly lost their confidence going over jumps after having a bad fall or something: Would you yell at them and tell them they were hopeless? Probably not, my guess is you would do everything possible to re build their confidence in a compassionate and supportive way.
So be as nice to yourself as you would to your horses! Everyone goes through times where you feel disheartened, whether it is riding related or not but the best thing you can do is find an activity that will allow you to gain confidence and don't rush yourself or set timelines, you'll know when your ready!
Good luck. (a long reply for a long post, sorry)
All horses deserve, at least once in their lives, to be loved by a little girl.