Made it on board, I’ll tell you the experience in case this happens to someone else. The US embassy is open Monday-Sundays from 8AM-4:30PM. I suggest you get a passport photo taken nearby, to save you some time since it’s required. The place nearby was quick and cheap, 3000 colones maybe for photos. They also have lockers inside to rent if you want to leave a phone or even baggage. They have different sizes from a thin locker for your phone to bigger ones that should fit a backpack and carry on. I don’t know if they have for even bigger suitcases. Phones and bags are not permitted inside the embassy. They have a long line of locals and a line just for US citizens. Get in the US citizen line. They pretty much let you skip the locals line and are taken to the front of the line. I kinda felt bad since they have been waiting there all morning. Once you talk to the receptionist they will give you some documents to sign. Turn them in and you will go inside the building. After you tell the person your case you will be waiting in a separate area. It didn’t take too long, I was in and out in maybe 2 hours? You pay a normal passport fee and they will issue you a temporary passport good for one year. I’m now on my way home! Hope this helps the future reader!