I have had a similar experience and found the first thing you must do is tell yourself you are NOT afraid of your horse. When you are riding, imagine you are a professional and explain everything to your trainer. Ride as if you are confident, even though you don't fully believe it yet. Don't push yourself too much, but try and do something a little harder on yourself every day, and you'll find your confidence soars. And if you can, get a quick ride on a total schoolmaster to boost it too. Also, herbal remedies help you stop worrying, such as Rescue Remedy, you should try it!
Custard; I love you! 3/1/2011 ♥