This is not a protection technique as far as I know, it neither banishes nor sets a ward, but raises your energy.
Note sure: I did it once a few years ago but don’t use it myself. I do qigong instead.
Also not for protection.
The Lesser Banishing Ritual of the Pentagram?
Also not great for protection - what this does is evict entities from your space if they are there, it does nothing to stop them coming in the first place, or coming back.
That is what WARDS and shields are for. You seem to have none.
No idea but if it’s like smudging, again it’s going to clear a space but not prevent things from coming.
You probably just saw stuff that was randomly coming through as you’ve not set up any kind of fence around you to stop that.
There are 4 tutorials for wards and shields in this thread, check it out. It’s no good throwing things out of your space if you don’t lock the door behind them.
I liken it to a bar throwing out the drunk, but he just stumbles back in and asks for another 
Gotta shut that door.