Thanks for your replies @Former-Member @Faith-and-Hope and @Former-Member
It was a lovely event and the words and music bubble up inside me for a while keeping the good feelings alive. Musically it was a success and the conductor and age reviewer were happy ... 
My son had a nasty cold for his birthday so feeling sorry for himself .. and we are cosseting him .. but we got through it .. the show must go on .. keeps giving us cause to rise to the task.
I will take on "drop a prayer at her feet" approach re cold shoulder lady .. it is just that for singing we are standing very close and need a sense of trust etc .. and just the shock that she felt so strong about me that she was being mean ...
Growing up I was always on the outer and very quiet and agreeable ... but often overcome and tongue tied ... all the years of therapy have kept my tongue moving ... lol ... so I am more open these days ... and have opinions etc ... now I am often in the middle as I tend to anchor the choir and give a solid note ... so I can concentrate on the huge improvement in that ... and let it be HER problem. I know they say we shouldnt give others the power over how we feel ... maybe next time it happens .. I will be better able to snip it in the bud .. and just put up protective wall ... it helped a lot for me to able to raise it here on the forum ... thanks all.
I also mentioned it as I know that SI still comes back to me ... but like @Kurra I discount it more these days ... than worrying I will fall prey to it ... especially if I have a reason to get my act together.
So the next few days will be relaxing at home and start selecting new projects.
@Former-Member I hope you realise how much it takes managing so many young adults in close quarters. As they grow more confident and stand on own feet you will get your space back ... hang in there ... being mum is the most important job .. I know you know ... but ... just telling you in case you forget it for 5 mins ...
cheers