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That does sound like a really big problem. The good news is that you might be able to apply some do it yourself pest control to this issue, by purchasing something like a bug fogger or bug bomb....

Other than opening windows there isn't too much you can do rather than wait it out. Although next time you might look into some ant or roach spray that doesn't have such a strong odor, sometimes...

You can also do it yourself if you have the right combination of bed bug sprayand know how to use it. Basically anything an exterminator will do can be done by yourself, but you might have to reapply...