Recently I acquired a new Calathea and upon bringing it home I gave the plant a wipe down. I found there are what looks like tiny tiny specks of dust on the underside of the leafs so I wiped them off but as I was cleaning, I also noticed TINY TINY WHITE BUGS crawling on the stems of the plant, there wasn't many of them and they're quite small (didn't look like cottony mealy bugs, nor did they have webs so that should rule out spider mites) but I have a feeling that it could be aphids, because I checked the leafs and they had these type of markings on them, which doesn't seem normal for the plant. I had asked the previous owner and she told me that she's never had a bug problem in her home, but it seems maybe they're just too small and were missed.
Any ideas of what they may be? My bets are these are done by perhaps Aphids?