Cervix position before period?

Hey ladies do my period tends to come whenever. Lately it’s been coming on either the 25th day, or 27th. I have checked my cervix all those times and it’s always been low, of course since it’s before my period. Today is again the 27th day cycle and no period.. I have nkt had sex. My boyfriend and I just do oral. My cervix right now is kinda high but not that high to the point where I can’t find it, and it’s slippery. It also feels like it’s to the side. But definitely open. Can you ladies help me out?