Confused :/

Meg • 31 years old... Happily married with a beautiful baby girl 💕
I am a bit confused now. My AF is always 26 days apart and this is day 27 and nothing. The past three days I had brown discharge followed by light pink (only when I wiped) followed by brown again. Now there is nothing but I woke up feeling a bit sick. I know I'm only 1-2 days late but I took a test and I was BFN. Is it possible that I still am pregnant or my AF just being weird. I really wanted a BFP and was kind of expecting it because of how my body is feeling right now.... Should I test again? Has anyone else gotten a BFN and need up a BFP in the same period of time?