Any offers?

I'm actually ******** myself right now as my firm choice hasn't gone back to me yet and some people are getting offers already. Should I be worried? Am I not a strong enough candidate?

If they haven't made a decision yet, then they're not your firm choice. It may be your preferred choice, but that's something different.

Universities have until mid-May to made decisions. Also, just because other people have received decisions doesn't mean you should have expected to.

A speedy decision isn't necessarily a good decision, as it could simply be a rejection.