It's best to use multiple sources since not all image searches reach every nook and cranny of the internet.
For instance, I've used my avatar here on multiple different sites so it's definitely not unique insofar as not appearing anywhere else online. It should come up with my accounts on at least two other sites.
But I would do some more fine tuning on your spidey sense - the face pictures, the fact that they're not even of the same woman, the sexual nonsense talk - those should all be giant red flags billowing in the winds of bullshit lol