Ya, thinking some kind of pest, b/c the spots are
too perfectly round than mold would be... As for what kind of insect, sorry to say, I have no clue... But it might help if u let everyone know what your growing conditions are (because spider mites, *for example*, like cond. that are hot and dry... So increasing humidity, wetting leaves, and decreasing temps will aid in getting rid of them, along w/ a good miticide) Good luck tho, there are a lot of very knowledgable ppl on this forum, so u are in good hands!