Need Help with the Final Weeks of my First Plant

Hello,
This is my first grow and I was looking for people to give me advice on making my plant get back to full health. She's flowering and buds are clearly showing, I believe she's about two weeks in. I think she has nitrogen toxicity and i've tried to help that by flushing it out with about 8-9 gallons of neutral ph'd water. Some new growth is beginning to show signs of fatigue because they are turning yellow and the leaf tips are curling inward. Some major fan leaves have already died and I cut them off. The tips of the hairs on top of the exposed buds are beginning to turn a darker color but id say about only 5 to 10% of all the hairs are dark. Any tips or advice would be greatly appreciated to help me pull through these last 4 weeks or so.

Flowering usually causes an N deficiency, hence the yellowing fan leaves many growers see come flower time. This is beyond that level. How did you arrive at your nitrogen toxicity diagnosis? Have you been over-feeding. Or did you see any dark leaves fall off? It looks like it's been flowering for awhile, which it probably wouldn't do with N toxicity issues.

I may be wrong, but it looks like you burnt it (too much nutes) awhile ago. You did right by flushing, but you need to get some nutes back into her. Like maybe 1/4- 1/2 strength. Something with Nitrogen in it for the next week or two. And you will pretty much lose all those fan leaves that have any yellow showing

Good Luck

Well I used miracle gro like an idiot and people have said that they've had nutrient issues with it. I've never given it any nutes since i've had it, just the nutes that the soil provides. I arrived at the N toxicity by looking it up on the internet and using process of elimination. I also posted in another thread with pictures and another user also thought it was nitrogen toxicity. I performed the flush that night. I was watering every day but now I cut it down to about once every week and a half because I was clearly over watering it. No leafs have ever fallen off they just looked life less and I cut them off to help the plant focus its energy on places where its needed. I don't really know anything about nutes or anything like that so if you could shed some light on that and where to get them that would be great. Once again any tips or advice is greatly appreciated!

I think u have a number of things happening. Nitrogen toxicity generally presents with a clawed leaves along with very dark green, from your pics I c no claw and the green in some spots looks a bit dark so id say mild if that's it. Flushing was a good thing a safe bet when shit starts to hit the fan. do u know npk values of the miracle grow u used and how long a go did u feed it that? I do think it looks a bit burnt on the tips and leave edges, one of ur photos looks to have a necrosis spot too. Out of curiosity r u root bound bc I've had similar issues with heavily root bound plant and once in a good size pot come right back around. I know u shouldn't do it in flower but if its reaction is bad due to pot size it won't get better till potted up. Good luck with that

With the necrosis spot.. should I remove it? Or just let it be? Also what humidity should the plant be at during day and night cycles?