How long to schedule a NREMT Exam test date?

Say, If i were to call Pearson Vue today to schedule an appt for my written Test for NREMT, how long would I have to wait? A few days? week? longer? I'm just wondering so I can plan accordingly.|||I did mine online you can call or go online and set up an account after doing that you will see a calender you pick the day you want to do it and it will tell you the available times to take it. You have 24 hrs before your test date to cancel or reschedule.