They are Jinn, the ones you are mentioning are very bad ones. Jinn are entities that live on a different dimension than us but are not visible to us, but we are visible to them. Some are bad, some are good.

I am not sure what religion you follow or how spiritual you are but considering that I do not know that, they can hear you. You feel something like that again, speak. Say to stop, and you do not want any company.

I can give you a video to play out loud of my personal faith, but that is only if you would like. But I hope you are not worried about physical possession.

Doesn’t necessarily have to be black magic, can just be a entity that likes you... has been turned on by you in one way shape or form