I have to agree with boneman too. You do have some major stretching in those plants. There should be considerably more growth in your buds for being in your fourth week.
From the looks of them the leaves dont seem to be too bad. They should recover fine just keep them on RO or distilled water for the next week or so just to be sure they are fully flushed. What nutes are you using exactly and how much? it could also be too many chems in your nutes dependig on...
I have always used a mix of both Fox Farm and Botanicare nutes for over 4 years now with great results everytime. I'm a fan of both very much using FF ocean forrest soil,Tiger bloom, and Bloom. And Botanicare pro grow and bloom along with my regular recipe with no burn whatsoever and a grade A...