What exactly are 'psychic happenings' and how will I know if I am experiencing one?

This is usually dependent on what your "psychic strong sense" is and if you have done any work to assist in its growth. My own experience tells me that when we begin to work on developing this psychic strong sense, there is development in other areas as well. There is no single measuring stick for how it happens or what you will experience.

One of the biggest, for me, has been some incredible synchronicities, where I seemed to be in the right place at the right time. Sometimes it is running into people that have what I needed, or getting a quick flash of insight of how to approach a problem, from out of the blue. Other times, I experience pressure in my ears when an entity is close by or find the queries to my guides arrive with answers almost instantly.

A lot of other physical symptoms can indicate a connection to the "supernatural" as well as including running into people from the past who we'd rather not see (for the purpose of amends or clearing an energetic connection to them), flu like symptoms can be a result of interaction with non-human beings, as well headaches and even stomach distress. The point is that if you are aware of an unusual physical symptom(s), then it stands to reason there is a cause. What I have mentioned here is based on my own experience and is hardly comprehensive.

But I do know that when we seek that contact, non-physical beings will find a way to communicate with us, even if we don't fully realize or understand.

That experience has two sides, "Demonic" is the other name. Spirits exist in the invisible world they can see and cause things to happen, so they are in the "know" on how to transfer information to your mind. That is what is happening, many don't realize this.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.