Af or implantation? Help

Ayshia • Lesbian couple ttc #1
A bit of tmi....So all day yesterday I felt extremely nauseous and had a headache and mild cramps I'm my uterus. Well today I'm 12 dpo and when I woke up at 3 am to pee I seen pinkish blood, a few hrs later it was brown with tiny streaks of red. Been like this all day but what's making me nervous is glow saying af comes tomorrow....