TMI but no images

Tammy • Me and my DH have been TTC for nearly 4 years now. We have 2 beautiful children already, a boy and a girl, and would love one more addition:-)
So I am roughly around 6dpo and though I went to the er yesterday ((asthma attack)) and they gave me a bfn pee test ((no surprise there since it was 1PM)) I woke with some off colored cm? Like just the lightest shade of pinkish brown ever. My AF isn't due till the 6th...