Slow down here folks! If you have been adding ferts for weeks, there is no reasonable way that it can be lacking already. If you still have the plant. Take it one thing at a time man, dont add ANY more fertilizers. From the posts ive seen you have added at least enough. Flush the pot with at least the volume of the pot in distilled water (1 gal pot = 1+ gallon water). That assures that you have flushed out excess nutrients, then take the pH of the soil. Use a quality device if at all possible. Allow several days for the soil to completely dry out, almost to the point of wilting. At this point you will now know if you had overfertilized, had a pH problem or overwatered. If at this point you still see no signs of improvement, then you can consider trace nutrients, epsom salts, etc. but you have already added those so it shouldn't be an issue. How big is the plant and how big is the pot? Are you using water from a water softener that has jacked to salt level in your soil through the roof? Are you using tap water then has far too many contaminents in it? Stick to the simple things and eliminate each option individually and completely before moving to the next option. Slowly as possible.