Ahhhh, poor little girl - you must be very confused and worried....
I, personally, would blame it all on that scarey helicopter - must have frightened the bejeezus out of her. Bad enough for us humans who know what's going on.
I think she now associates your room with horrible goings-on - and that's dreadful, for you both
I would take her to your vet (if you haven't already) and explain exactly how your little girl is behaving - and the course of events leading up to it - see what they say, and what advice they can give you.
I truly wish you both all the very best - must be awful xxx