Maybe you can take it slowly, over the course of a few weeks or longer if you need it.
Like go out one day and groom. The next day put the saddle on. Then tack up your horse and just lead her around tacked up. Then put your foot in the stirrup and take it back out. The next step would be to sit on her back. Sit for as long as you're comfortable and then get down. After you're comfortable sitting have someone lead you around for as long as you're comfortable if you get nervous just get off untack and try again the next day. Once you're comfortable with being led around ask someone to put you on a lungeline and steer on your own. Everything else just follows suit.
I don't know how bad your accident was, and I'm terribly sorry you had to go through it, but baby steps are a good way to gain your confidence back.
Everyone is different in how things affect them. Me for example, I am total opposite of you I fell off this passed Sept broke my wrist and dislocated my elbow. Right after my wrist surgery I wanted to get back on and ride(though no one let me don't worry) and after the dr cleared me I got on and started running barrels as soon as I could.
My friend on the other hand is terrified of falling, she's only fallen off twice in her riding career(10yrs) and each time it took her about 3 months to get back in the saddle.
By the sounds of it, it may take a while to gain your confidence but taking things with baby steps and lower expectations of yourself may help you out a lot. Never push yourself to do anything you are not comfortable with.
~ Hope is never light years away ~