3rd week since 12/12 and chlorosis is getting worse !!! Will my crop be crappy ?

Hey there MaskedHunter, the chlorosis on the newest growth is simply "inertia" from the magnesium deficiency which is an "immobile nutrient" so it will affect the newest growth first. The good news is that you're already fixing it, so just be patient and keep doing what you're doing. Just one more thing, you can see some N toxicity symptoms also, that's the "too dark" "too green" "shiny aspect" of the leafs. Probably you can cut the N by quite a lot to fix it. Both of these problems are quick and easy to fix, so dont panic and dont stress, because that is how you can make mistakes. I hope this helps ! 🚀