Need help, Not too sure what going on with the leaves

What you are seeing in the leaves is what occurred in the substrate 10-14 days ago. The brown edges is from over feeding, especially nitrogen. Anything with haze in it will prefer light feeding, half strength nutrients are usually plenty strong enough for this Sativa hybrid. At this stage there is nothing you can do, just don't feed it for 10 days and then when you resume feeding, only use half strength. Make sure when you water that you get run off, this helps prevent nutrient salts from building up to toxic levels, which is what has happened here. Flushing your plant will be detrimental at this stage, as this usually releses even more built up nutrient salts from the substrate, causing even more burning. Just water in normal amounts until run off, don't feed for ten days, then go to half strength nutrients when you resume feeding and your plant should pull through and recover. However, the burned/damaged leaves will stay damaged and will not recover, but all new growth should be fine if you follow this advice. Hope this helps, Organoman.