Period coming?

Period was expected yesterday (14dpo) but my temp went back up (I pretty much always get my period at 14dpo). Temp went down by .4 this morning to 97.97). Do you think af is coming? Does it have to continue to go up and up if pregnant or can it just stay about coverline (mine is about 97.6)? I have some cramps and feel like it should be coming but my temp normally starts going down at 12dpo which it didn’t this time.