JoBoxer,
Well done for getting through it, it will get better, it's a skill you will both learn together. Just remember anyone who laughs, it's because they probably had the same happen to them :-p Most exhibitors will try to help and are very kind to newbies, because even the best of them had to start right at the beginning :)
First time I went to a show with my dog, the dog went round the ring on one leg, jumping about like a lunatic, and my daughter was shouting from the ringside "loose lead mam, loose lead" :-D (they are shown on a loose lead, and to be fair MY end of the lead
was loose!) people in other rings stopped to watch and laugh! I couldn't remember how old my dog was, and had to check 3 times about the triangle because by then I was so nervous my ears weren't working. The breeder and a few friends had turned up to see the dog and encourage me, and said it was the best laugh they'd had in years! Next show the judge asked me if I could peel my dog off the ceiling!!

She was laughing as she said it! We were unplaced in any open shows until the pup was 18 months old!
Don't ask me why I didn't just give up, I suppose I just felt it couldn't get any worse, and at least we were giving people a good laugh, thank goodness we both got better eventually.
One thing I was recommended, give the dog a couple of drops of RESCUE REMEDY on the morning of the show. I took half a bottle of the stuff myself and felt a lot calmer - I could even remember my name afterwards! :)
Good Luck with your dog and remember, even the most experienced show judge can be shown up by their best dog - I've seen it happen and the judge said it stops him getting too big for his boots :-D