I imagine the lady you're referring to was what's called an 'invigilator', Penny ... supposedly, an impartial observer, brought in to supervise the examination. Butwith Iain; you have every right to feel aggrieved if she acted in a manner that led you to believe she suspected you of cheating.
Let's face it, as you've said yourself, each of the students was taking the test at a different level in any case.
My heartiest congratulations on your very creditable performance and, not least, for remaining calm in such harassing circumstances!![]()