Yes, well over fed..........too much nitrogen can cause excessive leafing at the expense of "normal" growth and/or bud development when in flower.
Quality soil like the one you are using should not need extra feeding for at least 4-5 weeks.
At this stage, give just plain water for the next 2 weeks, then when you resume feeding, start with half the amount you were using beforehand.
There is no need to flush, this can releases even more nutrients and may increase the risk of further over feeding.
A product with an N/P/K ratio of 16/11/11 is probably not ideal either, for veg, something like 6/4/5, 4/3/6 etc would be better.