Hi Kim, we did the “antigen test” which is accepted within a 48 hour period. Our last leg (MIA to SXM) was at 10:30 AM on Saturday, therefore, we took the “antigen test” on Thursday before at noontime (just in case of delays). Received negative results within 15 minutes. Got back to my office by 12:50 and filled out the EHAS form. Uploaded the PDF and was approved within 10-15 minutes. It’s really easy. Knowing what I know, I’d say, “don’t stress about it” but it’s still very stressful. You’ll be fine. Just follow the instructions. Good luck! .