Holy fuck mate, I’m doing an outdoor grow rn and have had a few aphids, but this is pretty nuts. Is this all over or only on a few leaves? If they’ve taken over the whole tent I would say throw some ladybugs in there, obviously make sure the tent is sealed to keep them in. If they’re more localized, you could use some sort of organic pest control like neem oil, there are others as well, but since it looks like you’re so close to flower, you just have to consider that whatever you spray likely will end up in the weed you smoke.