I recently discovered these gross looking bugs on a few of my plants, they seemed to start on the mint then moved to other certain plants. But they seem to be spreading slowly. They also seem to be sucking the life out of the leaves. They have a powdery substance around them and will leave it on the leaves and im guessing around what looks like their eggs. I also have a fungus gnat problem maybe they are attrackted to them?...Here are a few pictures of them. Thank you so much for any and all help..