I'm in the same situation. I've fall 5 or 6 times. Ridden in grassy areas. Ridden in soft dirt. Have got to get it in my head to clip out and THEN STOP. I recently had a problem where I clipped out in time but when I put my foot down the clip on the bottom of my shoe (because it is metal), slid a little. Maybe I should put the back end of my foot? or put my toe down? Don't know, this kinda freaks me out.

Saturday I rode with regular shoes, just to get used to the bike (its new). I ofcourse did fine, just gotta tweek the seat a little. Sunday it poured, so no ride.

I feel your pain, my knees have almost healed. Don't give up.