Had a fall,trying to recover!?

I've had that almost exact same thing happen to me, I'm thirteen. what I did was at first I just spents time with my horse, walking around his turnout with him. to get his trust agian. Then when I decided to ride i rode at everything EXCEPT the canter. And at about the third lesson, have someone watch you so you feel you have to push yourself. Then do your normal routine and ask for the canter. I know how hard this is, trust me though a for a couple of laps and you'll be fearless agian. Also, when you are really tense and scared, your horse can sense it so try and relax! I know how hard it is but you'll get over it soon! Also after you first canter, only do a couple of laps, then tell him he's a good boy and cool him off, this wy you end on a good note!