Flowering deficiency

Hi guys, first time growing currently on the 3rd week flowering and noticed new leaves with brown spots as seen in the photo possibly needs calmag but not sure as found could also be fungus? Appreciate any helpt

Calcium deficiency. Predictable in the first 4-5 weeks if you haven’t given it or given enough of it.

Subbed to see what the problem is. Lots more info is needed. My guess is lockout. Could be from feeding bloom food too soon or a PH issue but my guess is lockout.