hi Lin
you already had the interview with the supervisors, and it was great!
You are right when you say "now I can do is nothing", you just have to wait.
I agree with you that the waiting period (for a scholarship offer) can be stressful and worrying.
You can strengthen your competitiveness in OTHER applications (by writing better proposals, letters, research ideas, improving your cv, taking up some credible course to add in your experience and cv etc.). HOwever your interview for this particular scholarship is already finished, you should just wait and see (for this one).
Because we want something so badly, it also hurts us very badly.
If I were you, I would "let go" a bit of my desire for this scholarship, just take a step back and breathe, relax.
Go and do something nice for yourself. Applying for a scholarship--and taking the interview is a lot of hard work.
regards
satchi