I just discovered "PK/TK" a few weeks ago. It has come to my attention that I think I have been using shields unknowingly for years.
I have used shields to sense the presents of people in the room mostly. I know when someone is walking around the house, a car goes by, someone rolls in their sleep, all without hearing anything. I have also used shields apparently to stop bad energy from entering my body. I had night and day terrors for years and years and they caused me much distress and I tried to put a mental barrier up against them, I didn't know this was a form of TK at all until now.
I'm still not positive if these are or are not TK/PK, just from what I know it sounds like it.