Brown spots all over leaves! Help is appreciated.

[Rambocantona]

Hi all
noob here,i have autoflower as pictured, but it has started getting brown spots on leaves near budz and on fan leaves.any ideas please? .got about a week or 2 left and using led and coco plus soil.thanks
Rc

[Jordann]

I'd vote some bugs if some kind. Looking very closely can you see any? In the soil or on the plant. Under leaves or on stems. If not possibly a calcium deficiency.