What kind of flying bug is all up in my house?

Question

My house is infested with tiny (like, so tiny that they're almost invisible) white flying bugs that are attracted to heat and light? These bugs may or may not also be leaving little brownish-orange-ish and black spots on my walls? I have an exterminator coming tomorrow, but seriously, this is driving me crazy. What are these freaking things?

Answer 1

Don't hold me to this but they may be miniture moths

Answer 2

Could be gnats or fruit flies.  If you have had any fresh fruit sitting around, that is probably the source.  Set out small bowls or dishes of beer.  They will be attracted to them, fall in (maybe they get drunk?), and drown.  (Look close, they may have little smiles on their faces;)