Is it an indica dominate strain? (8-10 week flower time?)
How long has she been flowering?
Why did you stop the nutes two weeks ago?
What does she look like now? (weird leaves, yellowing, leaf-edge browning or yellowing...)

The idea behind flushing is to 'clean' the soil of nutes so the lady will use her own 'in-house' resources. You are flushing the soil, not the plant. But if you flush too early, growth and development decreases, and stress increases.

I'd lke to say I'd avoid the additional nutes at this point, but is depends on what they look like, and the answers to the questions.