First , why would someone like you want to work here, sounds like they felt you had a lot more talent and was wasting it there, ** sounds like they liked you to me ?
It also sounds like you may be suffering from a complex where you feel unsure about others intent toward you.
But first if a professional put a bug in your home, you would never "see" it it may be in a light fixture, in a light switch, inside a radio or TV or the therostat of your heating system.
Anywhere along the phone line outside or in.
Also there are various types of bug, on different frequencies.
So if you want to be sure it is clear, you hire a professional, ( cost about 500 or so) to clear the house.
Then you install a alarm system, with wired video ( if it is wireless, someone can tap into it also)
Of course if they are using infrared listening, they can do that from outside the home though the windows,