When did your wife test positive and what means of testing was involved (on both accounts - yours/hers)? Did she participate in the mold removal? Was her diagnosis prior to or after returning home?
The Antibiotics could explain the development of your symptoms. How is your wife treating her condition? Does she have any actual condition/experience symptoms?
My suspicion is that you could easily be dealing with more than one organism (of the fungal variety) at this point -- in fact, more likely so than not.