Glad its looking better,

Now I would leave it alone as far as using ferts for a while. Let it recover coz it sounds like it has gone through quite a bit of stress. I actually only fertalized my plant once during its veg state. I believe that as long as the soil is at a well balanced PH level, theres really no need to fert, atleast not too much during vegging. Just use plain o'l water for a while and only use fert if your plants starts showing signs of nute defficiancy as discribed in the link Das provided above.

The flowering stage on the other hand, I have fertalized every 3rd watering with a bud and bloom mix, 10-52-8, high in phosphate coz they consume a lot of it during flowering.

Good luck!