I, too, am falling into despair awaiting any kind of response. I've only heard back from one school, and unfortunately, it was a rejection. I am currently awaiting on five other schools. No interviews were had.
Curious, but mostly because I am in a permanent state of anxiety and have become mentally paralyzed to pursue other work, I did some research online to better understand why the five other schools have yet to send out their decision. I mean, it's two weeks from March... One of the very plausible explanations that I came across was that I am most likely wait-listed. So, essentially, my future dreams are contingent to accepted students declining, and of course, my ranking being high enough on the list for such declination to matter.
Is this what others have come across? Good luck to all!
