You should certainly be concerned, and not necessarily trust that you will have a smooth time through customs.
Firstly, a statement from the State Department has been made that:
Trump Visa Ban Also Applies to Citizens With Dual Nationality, State Department Says
“Travelers who have nationality or dual nationality of one of these countries will not be permitted for 90 days to enter the United States or be issued an immigrant or nonimmigrant visa,” a State Department official said.
It also applies to people who originally hail from those countries but are traveling on a passport issued by any other nation, the official said.
While it is absolutely impossible that this statement includes US Citizens, the fact that the policy was implemented and rolled out as an emergency measure means you would be at the mercy of the current immigration official's understanding of that. They will be stressed, harassed and miserable, unsure of the rules, and inclined to play it safe. And your needs will be secondary to theirs.
As practical advice, I would ensure you travel with a fellow native-born single-citizenship US citizen whom you trust, preferably Caucasian, who should accompany you if you are detained.
This will effectively give you a second person to act as a "known figure", and whose citizenship status will not be in question by the authorities.
Basically, treat the current situation as if you were in unsafe territory, with poorly defined rules. Hopefully, you will stroll through brandishing your US passport, secure in your citizenship. If you are arbitrarily detained, your ally can relay messages, and ensure you are not accidentally lost in the system.
I am obviously terribly sorry that you have to put up with this, and hope it all goes well for you.
Ongoing details can be found here.