Something in my house causing sinusitus, who to call?

I believe there's some smell or chemical or mold in my house that's causing my sinusitis; the symptoms only appear when I'm inside my home, and moving isn't immediately an option.

I'm quite aware that smells alone can't trigger sinusitis, but I need to know if something actually smells like what I'm smelling that is triggering my symptoms, or if I'm just smelling the liquid in my sinuses triggered by some odourless allergen.

Is there some company or cleaning service I can call to get rid of possible smells or deep clean my floors?

Edit: I've also had my aircon deep cleaned by osoujihonpo so it's probably not mold in the aircon.