The thought of Mold in you home terrifies many people. And rightly so. Some Molds are very harmful.
The first instinct is to call a professional mold inspector who will likely charge hundreds of dollars to perform an inspection you can do yourself. In fact, the chances are you can and will do a better job. Inspectors want to get in, get out, and get paid. You have more time, more opportunity, and more at stake to poke into every corner and know the history. Be more thorough.
A mold inspector will likely recommend professional remediation. That's a big word that will cost Big money. Most likely, you will be able to do most or all the work.