When I looked at it, got a sense it was a form without a body.
Reality is highly populated with entities, even though most people are oblivious to it. Fortunately, most of the stuff out there is friendly, although you will encounter a lot of mischievous behavior, which I what I sensed about your encounter.
It’s not too difficult to reach a level where you can perceive these things.
Also, most shielding methods stink. Just my opinion based on working with thousands of people over the years. If you keep running into issues like this, get some better training and learn how to protect yourself. Being invaded is not a requirement.