It depends where you live. What day will your test be on? If it's during a weekday you should be fine at that time, the only times you wanna be concerned about during week days will be the rush hours (roughly 7-9am and 4-6pm).
.. if you're doing it on a weekend though.. good luck
I'm sure you'll be fine though, you're lucky to get a test slot so soon after your first attempt cos normally they book up weeks/months in advance and you have to wait. There must've been a cancellation or something if you managed to get one so soon.
Good luck sis!