Cervix Position

Hi! So my partner and I are not specifically trying to get pregnant at this point in time, but I just got off birth control in early August and am just trying to start tracking to make sure my body is ready for when we are! I also have PCOS which means irregular cycles. Last period was September 19th. No idea when I ovulated as I said I haven’t been tracking anything consistently, but from what I have tracked from CP and CM, looks like i might have ovulated the last week in October.

So for the past few days, my cervix has been low and firm with next to no CM, leading me to believe my period was coming. Today I go to check at the same time I always do, and it’s high and firm, almost to the point where I can’t even feel it.

I don’t understand what’s going on, I have taken a pregnancy test and it was a first response with what looked like a slight indent, pretty much no color. Any insight? I feel like if I was pregnant I would have at least a faint positive by now?