ustav19, my first advice would be to not panic and don't despair. You've still got some time with the remaining rounds, but you'll have to be shrewd. The schools that you applied to are known to be quite tough to get into, so don't be too hard on yourself.
Also, it's hard to tell from here what your essays/apps looked like, but what I found to be very helpful in putting in a strong application to ANY school is to customize each of your apps very specifically and very strategically to the schools that you are applying to. It's not enough to simply create your profile on a school's website, fill in your details, ask the same references to resubmit basically the same recommendation letters, copy-paste the majority of your essays, etc. all in the space of a week or two. I'm not going to say it's impossible to get away with that, but it's exponentially harder. You really need to know why you're applying to a school (simply because it's in an Ivy League school doesn't cut it) and you need to convince the respective school's adcom that you know, too. The process of getting to know the school, its offerings, program structure, and then aligning your own goals and ambitions with the school can take a long time, possibly even involving more than a year's worth of rapport with the adcom! (Trust me, campus visits, Q&A sessions, email conversations, conference calls and online forum discussions with the adcom and, if you're lucky, alumni can really take months but are an excellent way to stand out from a large pool of candidates).
So my advice to you in the next upcoming weeks/months is to really dig deep into the curricula and offerings of two or, max, three schools that you'd like to apply to, absolutely convince yourself that you belong in that school's program, and concentrate on putting together the best darn app you can so that you can convince them of it. As cheesy as it may be, ask yourself: if this school were a love interest, would I marry it and why? Also, be honest with yourself and don't be afraid to try in schools that may not fall into the usual prestigious top-tier school category, i.e. just because you got into Georgetown and not Colombia doesn't mean you're not going to get an awesome education/experience - it really depends on how you align with the school.
Hope this helps! Good luck!
