Don't know what to think (TMI)

Any and all info would be greatly appreciated: I am currently CD 36 and 16dpo. My cervix is high, soft, and what feels like, closed. 2 days ago I started to have very light pink/brown CM. I took a test this morning and got a bfn. I just don't know what to think with mixed symptoms! Also experiencing cramping today and breasts are very sensitive.