@Americlap and any other interviewee who are/is going to be freaking out about their interview performance after the fact:
(1) To be blunt about this, your opinion of how you did on an interview doesn't count at all.
What counts is your interviewer/the adcom's opinion of how you did on the interview and unless you're a mind reader, there's no way to accurately know what they think.
Furthermore, your opinion of how you did is highly skewed and inaccurate. Think of interviews like talking - you might think your voice sounds one way, but everyone else actually hears something else, and there's no way for you to accurate know what your voice sounds like unless you record it (and no one wants to do THAT). Pre-meds are generally a lot harder on themselves than other people are on them, and every interview invitation inevitably comes with glossy visions of a perfect interview in which you impress your interviewer with spectacular insights on healthcare reform, tell jokes, and the two of you laugh and bond and smile and enthusiastically shake hands. Just because this isn't what happened, doesn't mean you're not going to get in. Where you might see a mess of ums, uhs, awkward silences, and filler phrases, your interviewer might have seen a thoughtful young person, if a little nervous, who gave logical and coherent answers. Keep in mind that the interviewers are comparing you with the hundreds of other nervous students whom they've interviewed, not the glossy vision in your head, and not the practice interview you had with your advisor that went absolutely perfectly.
(2) That interview has no past - you can't change the past so there's really no need to be worrying about it. Don't dwell, focus on improving!
(3) Go play and do all the fun things that you won't be able to do as often as you want to when you're a med student!