customs and immigration – Foreign Passport and US Passport

So im in the process of gettin my US passport but I also have my foreign passport that i traveled this April. I used my greencard to travel with it but they already accepted my US passport. (I did not know i was already citizen until now). So im a dual national now.

So my question is:

I need to travel August 12. To my my country of birth. The passport people have my greencard because i had to give it to them. So would it be possible to travel with my foreign passport but have someone send my us passport to where im at and come back with it ??

Or would if be possible to get an emergency passport at the home country US consulate ???