here some pictures I just took with the flash on and with out flash.Blue cheese auto flower.almost 6 weeks old.plant is taking a beating should I flush and start over with just water for a week.
I think your plant desperately needs some water. That soil looks bone dry. If you using a super soil and nutes I would flush it first and then see from there. But it does not look like its nutrient burn. The leaves look good, maybe a little too dark green, but I think something else is the problem.
I agree with @chrisj just do a week of water ph around 5.5 and see what happens…