Confused, help? High cervix during AF

Yesterday my cervix went from low to high & soft..& along with the symptoms I've been having (exchusted throughout the day, sore to the touch nipples, a lot of CM, dizziness, really nauseous, cravings, high temp).. I swore I was pregnant but.. I got my AF today.. & TMI I checked my cervix again & it's so high I cant reach it. The only time it was like this was when I was pregnant & my cervix is always low & firm during my AF. Does anyone know what this can be? Or has anyone experienced this?