Qabtawi

I don't think you can do much about this, everyone I know is nervous during this time.  Here is one thing though, in about a month, this will be over, you'll have your visa approved, and you'll be packing your bags to travel... 

Only a copy of the US citizenship certificate or copy of US passport

Trump's executive order targets the refugees, there is talk that they will suspend issuing Visas for resudents of several countries including Syria for 39 days, this order has not been signed yet, even if it does, the worst that it will do to you is delay your Visa for 39 days, but you Haven't cleared the NVC so you should be fine... stay strong

Interview date and instructions are sent via eMail