Ok then kill that plant and start over............. Just kidding. You are in a very difficult situation because without expensive lab equipment there is just no way to know the status of your soil. This is what I would do. Dig as much of the soil out of the pot as you can without damaging too much root structure and replace it with the same

OF you started with especially on the top - do not add anything else except PHed to 6.5 - 6.8 aerated water (no chlorine) and 1/2 teaspoon of molasses (no sulphur type) in 2 gallons of water and only add the sugar once. The idea here is to replace the microbial colony and feed it sugar to multiply fast. Only water to slight or no runoff. The water will help distribute the new living colony. The plant should respond well in a few days although some damage from what has happened to this point may continue to show for a while. The new soil is going to be higher in N than ideal for bloom but at least there will be some balance.
A common first timer mistake is getting the available nutrients out of balance and then they chase the symptoms with additions that further the out of balance status. Soil chemistry is very complex. It is the living microbes in the soil that make the elemental salts (NPK) and minerals available for the plant to take up and use. Flushing them out just leads to more deficiencies. Learning how to nurture those microbes is more effective than feeding any of the thousands of nutrient mixtures out there as long as you are starting with good balanced living soil.
I have talked about balance and what I mean is call
Liebig's Law of the minimum. It is a simple concept with far reaching effects.
I hope this helps. If it is any consolation I have killed many plants and even trees over the years. Some lessons are learned in the school of hard knocks!
Good luck