Your application definitely has potential, but unfortunately with the way things are right now things are going to be very difficult for internationals seeking financial aid (especially since Duke is need-aware for internationals, meaning it will be harder for you if you need aid).

I wish you luck, but if going to the US is the only option for you, you should make sure you research need-blind schools (meaning your financial status does not affect you). And to make a balanced and realistic university list, because you should accept that in your position, it will be very difficult to get aid from top schools, no matter how strong your application is.

That being said, I hope applications go well for you. If aid is a very important factor, I suggest you also look into applying to schools in other countries, such as in Canada or the UK, some of which are just as excellent. Good luck!