Yellow veins?

mag or zinc def?

Had nute burn 2 weeks ago

and how do you fix day 3 of flower

And its still growing not stunned

ALSO WHITH THE NUTE BURNED AND I FLUSHED WHICH WAS PROLLY A BAD IDEA SINCE IM USING MG SOIL AND THAT JUST MADE IT RELASE MORE NUTES FOR THE PLANT AND COULD THIS BE A CAUSE FROM THE NUTE BURN EVEN THE NEW GROWTH HAS YELLOW TIPS

also havent used any nutes since