That's the feeling! I can't stop thinking there must be red flags on my application.
I'm new to this site, but I joined to give advice/encouragement/tips, etc.
It is a common misconception that a red flag at school A will 'carry' through from school B-Z, or that a red flag to one reviewer will be a red flag to another or all other reviewers. To give you an idea of what I mean, here is an example of how things work on the admissions committee I serve on...
My school assigns designated screeners with the task of reviewing applications. It's not a round table with people voting nay/yay for an interview invite. I know for a fact that one screener doesn't care about any minor behavioral issues (e.g. drinking in a dorm that resulted in disciplinary action). On the contrary, I know of another screener who will pass over any applicant with any infraction involving drugs/alcohol. Similarly, there is a screener who cares about absolutely nothing (and I mean nothing) but numbers, while a few other screeners will look at the 'whole story' and pick 'weaker' applicants who have some grit/life experience.
What am I trying to tell you? The process is much more subjective than one would think (as is the acceptance process, albeit to a lesser extent)...and sometimes your fate at a school is determined by luck. I know for sure that my app would have been tossed by the screener above who cares only about numbers. Luckily, my app wasn't in his/her pile a few years ago.
Why am I telling you this? I know it's hard to believe, but you shouldn't allow any of your self-worth to be determined by this process. Are there certain metrics, behavioral qualities, and experiences that are required? Yes, absolutely. And people who have deficits will find themselves without an invitation all year. Nevertheless, just remember that most applicants are at least
somewhat qualified in one way or another, yet the majority don't get in each year.
One of the top people in my class applied 3 times...if he didn't tell me, I would have thought he got in Oct. 15 and had a 515 MCAT. Keep going, keep pushing to make yourself better, and don't ever let this process get the best of you. If you truly want to be a doctor, you will become a doctor. Best of luck to all.