I'm guessing knats help

There very small and really fast movers.Im trying to catch one to examine it.What do I need to get to rid of them

Need more info and a picture if possible. Colour, rough size etc.

Fungus Gnats look like tiny black flies and their larvae look like tiny white worms. Any of those around?

Are you in soil? If so rub your hand through the dirt and see if you see them fly up. If so then DE (Diatomaceous Earth- food grade) should take care of them, plus some sticky insect pads and your good too go!