Thought I'd come out of lurking as well. I've received 3 rejections, and am waiting on 16 sites. I really don't know what to make of it. I had always had the thought "What if I don't match?" But never really had the thought "What if I don't even interview??" That thought is creeping in my mind right now and I'm terrified🙁

Oh my god, you have SIXTEEN sites left to hear from! You do realize that is a lot, right?? Don't get so down on yourself. A lot of people haven't heard from a lot of sites - just because it is getting down to the wire doesn't mean it will be a "no." Sites just seem to be behind this year (the portal always going down, increased number of applicants, etc).
To everyone: Try to stay positive. Unless you have 19 "no's" and only 1 site left to hear from you shouldn't even be considering the possibility of no interviews. Come on, we tell our client's not to catastrophize. It is time to put all that talk in to practice!
And for those who insist on being negative, here is your pity party:
