Overwatered, too much nitrogen? PLEASE HELP ME. AAAAHHHH

Hey guys, I'm about half way through flowering my potted plants. The biggest plant is in trouble. For several weeks she had drooping leaves and very dark green leaves. "Too much nitrogen" I was told. So i flushed my plants. I had just watered, but figured I'd be ok soaking them once. The next morning they were severely drooping, and have interveinal browning on almost all the leaves. I pulled it from its pot and put a fan on her for 24hrs. I then put her in a bigger pot. I'm wondering if I should spray the leaves while she dries out? Also, when should I water again? Thanks guys:jointsmile:

Wait until the pot feels light (like there's no water in it, just soil) to water again. That's all you can do right now.