Nitrogen defiency?

Trying to get on top of this issue I'm having with my northern lights auto. I'm using fox farms and promix hp soil. Ph last feed and water 6.1 and 6.2. I started seeing small yellowing signs a couple weeks ago and thought I spilled nute solution on the leaves which I'm thinking now is not the case because there's too many leaves effected. 3-1 I fed 1.6ml floranova grow, 1.6 floranova bloom, 1ml rapid root, 1ml floralicious. 3-9 I fed 3.5 ml floranova bloom along with the others. Didn't mean to feed back to back. Then 2 days ago just water. These symptoms were already showing before the last 2 feedings. I also gave 3/4 teaspoon of cal-mag on 3/9 to see if that would help. No results yet. I attached a pic of leaves I cut off today, and another with leaves still attached

looks like overwatering damage

Wow, really. I did think I was having a water or oh issue. My leaves have been very droopy but only the last few days. I didn't know over watering caused issue like that

Looks like lockout. What is the ph of your soil? Might be too low.

I haven't checked in awhile, last time I checked my oh going in was 6.3, ph coming out was 5.6

So I watered my plant Wednesday Morning, I ran 116 ppm, 6.5ph water through, it came out at 5.6, and 846 ppm. I then decided to give it a feeding. Fed same stuff as I posted earlier with a ph of 6.9 and ppm of 612. It came out as 680 ppm and 5.7ph. I added another gallon in at 612ppm and 6.9ph and it came out as 646ppm and 5.8-5.9ph. Within 6 hours the leaves were looking pretty and perked back up again. I think on this plant it was only filled with promix hp. I checked 1 of my others plants which is called cheese, that's mixed with promix and ff ocean forest and I gave it 6.5 ph water with 115 ppm and it came out at 5.8ph and 2046ppm. Plant looks beautiful. I'm adding pic of what the plant I had issues with looks like today. Thanks for the help!