Strange yellow spot on leaves

So today i noticed strange yellow spots and even Black spots (or holes i do not know) on the leaves of my 25 day old NL. Probably a sort of parasite like bug or fungi?? I even noticed pistils, and i don't know if It Is a good sign in a so young plant. There are some photo.

I would say those black bugs are doing that. I think those are bugs, it's hard to make out. In the second pic the yellow spots are all the same shape and size. It even looks like there's a black bug on a few of the spots.