My last cycle was 26 days with a 10 day luteal phase and my cover line was at 97.8. AF showed up 4 days ago, but my temps have still not dropped below the cover line - temps have been 98.0, 98.4, 98,6, 98.2.

I have had sporadic days of of sorta high temps (98.0, 98.2) during AF before, but always with low temps (97.7 ish) in between.

I've been using the same thermometer and temping at my usual time. AF has been lighter than usual but definitely more than spotting.

I've attached last month's chart and this month's so far.

Is this normal? Has anyone else experienced this? Any guesses about what might be going on?