I'm 13 DPO and..

Amber • Wife💍 | Fur-Mom 🐾 | Momma to a sweet babygirl 💕 |
AF is suppose to come tomorrow and I have no symptoms what so ever of it coming. I tested yesterday and it was a BFN :/ If AF doesn't come in a couple of days should I retest? I'm so new to all of this and trying to figure it out.