Confused about body possible pregnancy

Hey I’ve been checking my cervix for about 2 months now , and trying to conceive after a miscarriage 3 in half months ago. I took a ovulation test it was positive , so I had been having sex before and up until my ovulation date and after. Around my ovulation time my cervix was low and firm , then i checked it again it was high and soft . But I read that before your period your cervix will drop low , unless your pregnant then it will stay high and soft . So I’m confused of why my cervix is still high since ovulation and my period has come and gone and it’s still high and soft . Is it possible to have one last period before pregnancy.??? Has this happened to anyone???