Hi there Ribadow, hey it's not that bad, really not lol It's mainly/only calcium deficiency because you've not been feeding any cal mag and there's basically no cal mag in soiless mediums so you ran into a deficiency around the time of the flower stretch which is when the plant really needs it. The calcium deficiency you can tell from the "spotty" "rust colored" spots. Looks like you have minor N deficiency too, probably because the plant didnt get enough micro nutrients which it uses to regulate it's NPK intake. Fix the cal mag issue , dont touch your bloom fertilisers and hopefully the plant will recover within 10 to 14 days. Hope this helps ! 🚀