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It could be spidermite but it doesnt look quite right to me, id think thrips more likely. spidermite specs are usually smaller than that, im not saying it isnt but i wouldnt say 100% yes.
I think we all agree its pest issue though and easy to see what just by looking under leaves with magnification.
How far into flower, the pest problem won't make a huge difference if you caught it in time. Don't worry too much but you will probably want to do some research on washing your bud. I have seen outdoor growers do it with lemon juice and water mix. To clean off any pesticides. Don't want to be smoking that. Good luck and happy grow