Some Signs

Hearing Voices When you Know You are Not Crazy
Just out of the lue, you being to hear voices non stop for 24 hours. No matter what you do these voices do not stop. Not only is it voices but also sounds where you check there is no one there. Consider the possibility of voice to skull.

Sudden Loss of Concentration, And Memory
For some reason concentration becomes a challenge. Also you begin to have innocent minor memory incidences but just occurring too often.

Feeling There are Hidden Electronics Somewhere
You get the sense there is someone watching you, there are hidden bugs or surveillance some where. If there are other strange personal events at work and socially, then chances are there are bugs.

Strangers Seem To Know About Your Personal Life
When you thought you were alone or thinking to yourself, people just happen to know what you were doing. Also people seem to consistently know what you are thinking, were watching on tv etc

Being Stalked Consistently
You are being followed or being stalked even by your own colleagues and friends.

Constant Theft, Misplaced Items
Stuff goes missing, misplaced, or not even stolen but just moved around

Workplace, Personal Business and Social Life not going Well
Combined with hearing voices and stalking, there just seems to be the sense everyone is ganging up on you. If you have all these three then chances are its organised stalking.

Fatigue and Tiredness
You are just tired and have lots of fatigue

Lack of Sleep
You cannot sleep, instead you hear voices but you know you are not crazy it could be voice to skull