I know it's hard but try and forget about it lads, you'll only drive yourself mad.
I experienced basically the same as you two but we have no idea of how they weight each exam, so who knows. These things are never perfect, but Etihad have been pretty sound offering us this chance, especially for free!
Focus on other parts of your flight training in the meantime. Maybe take an exam or whatever the next hurdle is in front of you so if the result isn't favorable, you'll still have momentum and won't get too down.