You may 'sense' things - if you have asked to. There is a tendency is to observe things and energies corresponding to the degree of sensation enabled with an elevation (on the Hawkins' Map of Consciousness).
Clairvoyance, Clairaudience, etc. may show up in your awareness - Or you may "sense" things that were not detectable when at a lesser number (numbers are not "good" or "bad"). - Reference David. R. Hawkins, MD, PhD. Note the Chart:
Some people posit that, since we're in this Transition/Ascention Period of time, energies of a malevolent nature are 'pulling out all the stops', so to speak..
I'm informed that In cases where people ARE "protected" - meaning nothing can attach itself to them - there remains the possibility of thought forms influencing them - especially when their guard is down in sleep.
The remedy for this is to 'dial up' the purple light portion of your shield fully prior to going to sleep for the night (which protocol we add as of this writing)..
Another VERY USEFUL tactic is to Get Your Mind on something that is simultaneously entertaining and challenging.. such as the book in the link below.
Each and every one of us has control of our own mind.. To the Degree that we choose to exercise it. Like a bicep, If you don't use it you lose it.. and Mind can atrophy - or make advances undreamed of a generation ago...