Didn't get AF today...

Ann

So the past 2 days I have been really feeling like my period is coming, minor cramping, bloating, and today I had a headache and occasional mild nausea. I was due for my period today but never got it. I actually felt like I had gotten it yesterday but when I checked there was no spotting or anything! I'm wondering if yesterday's temp dip is normal? I probably won't test until Saturday morning anyway but just curious!