Hey bro. So sorry to hear you're troubled. What soil are you tiering into? That definitely looks like burn to me. I don't know what exactly to tell you... I don't know if you should flush or try to bring your pH down in your soil. If you don't get an answer soon I would try PMing someone like JM, Bailer, or Muddy maybe... Like I said it does look like burn and I'm sure you already know that but if your soil you tiered into is too hot I think there are things you can use to bring it down like Dolomite Lime BUT I'm not sure... Something to look into tho while you're waiting for a better answer...
I hope you get this sorted out soon man! Sending lots and lots of positive Karma to you and hope you get a better answer soon!!!