How much would it cost to have someone come and check the air quality in my home?

what are these people called! lolz! i think, since i live in a victorian house, there is stuff in the walls that is making me very sick. i definitely know, because we have brick under and behind our fireplace, there is asbestos under it, but i want to know what else is ion the house. i live in northern cali. ball park range guesses? btw, i live in a 3 story house and i am on the third story.