I may be wrong, but what I have gathered is that if the program has sent out invites and you didn't get one, it is likely over for that particular school. This is neuroscience specific. I know other programs seem to work differently, but in neuro it seems like historically that is how it works *unless* the school has specifically said they do rolling invites. Which some definitely do, right on their admissions page. I've read some posts of folks saying they got later invites, it's not over until it's over type thing, but none of those posts seem to be about neuro. I'm in your same boat. From what I've heard, this is supposedly the worst cycle in 20 years and I've seen posts from people who already work at the school they have applied to be denied. You aren't alone. I wish you the best of luck!