Cervix before BFP?!

Leighann • RIP my 👼🏾 03/2010, Mommy to Nova 04/2019 💕 and soon to be mommy of Parker 10/2020 💙!
My cervix is low, idk how to describe the feel but kind firm I guess, and closed (from what I feel)! AF was due on the 3rd ..... I've been having watery CM, cramps, nausea, headaches, slightly tender breast, and semi pelvic pain! I keep posting, I know but I'm just so curious and I think my mind is tricking my body into acting pregnant. I've taken test 1 day after late AF and got a negative! I just want some input!