Late but no BFP

Brandi • My name is Brandi and my fiancé`s name is Joe. I`m 23 he`s 25. TTC baby #1. I`m a hair stylist and he`s in flooring.
So AF is about 3-4 days late. My breasts are a little sore and I'm bloated (I never ever bloat even when AF comes). No sign of AF, no back pain or spotting. I took a pregnancy test yesterday morning and it was a BFN. Could I still be pregnant and there isn't enough hCG yet? I'm starting to stress a little.