I think you're being hard on yourself, yes it didn't turn out the way you had hoped but you've performed many times before and will again in the future. Pressure is such a hard thing to replicate and most of us wouldn't even have managed to do as well as you did, especially the first time in that situation - you didn't completely go awol, you just made a mistake!!! Feeling down only shows how much you care! As you say on-wards and upwards.
<3 together we will conquer the international racing scene!