Have had clipless pedals for going on two months now and I think it's only the last week or couple of weeks I've stopped feeling petrified every time I went for a ride. The funny thing is, I think the fear is actually much worse than the fall. I've fallen once from being clipped in and once today cause I intersected with another cyclist (thought he was turning on the bike path but was going straight ahead) and both times didn't really hurt that much. A bit of road rash on my elbow first time, and some bruising on the leg, but looked much worse than it felt.

I think now I've realised that low-speed falls really aren't that bad, I've been able to relax, just see it as an occasional part of cycling and stop being scared (and finally enjoy the ride - except for the steep hills )

I actually think a clipped-in fall on the road or bike path probably hurts less than your fall from the trainer, Roxy! My advice is, expect to fall again and 1) It probably won't happen, especially because you are more aware of clipping out before you stop
2) If it does, you won't be so shaken up, which I think is the worst part, more than any hurts.

Also, remember to lean to the side you are unclipped from when you stop, and apply brakes. At first, I would lean to that side and my body/brain's balancing instinct tried to then compensate by immediately leaning to the other side to 'right' myself. This instinct is great normally, not so good when you're clipped in! But this goes after a while and you get more used to this way of doing things, it starts to feel more natural.

Good luck!