Yep, had it myself. Nute burn definitely, all is not lost. I backed off for a week and a half and used water (lots of it) every 2-3 days) - also i think your PH is too high, it is for me anyway and a hight ph can alter the way nutrients are taken in, so it has to be right, i go at 5-5.5 always works for me.

ps and when you do go back ont he nutes ..half the stregnth for a week or two