Ok so I'm about 8or 9 dpo and my bbt has stayed up around 98.20 since ovulation except on 6or 7 dpo when it dipped down to 97.70.  So I took a hpt this morning and still bfn. What do you all think? If I'm not pregnant should my bbt drop the day of my period or a few days before?? I'm a little confused. Any help is greatly appreciated!