You need to know that your stronger and better than all of the demons and bad spirits out there, even if you do have low energy. Don't let them use you.
You might get weird visions, or those weird obes things you were talking about because of your low energy. So just try not to let them scare you, because I think that this might be one of their "techniques" into like, possessing people and that kind of stuff.
And you must remember that spirits are not physical, but we are. So they cannot harm you phtysically unless you let them.
I hope this helps at all.