BBT much higher this month...

Amber • 7/1/09 miscarriage (8w2d), 5/31/10 my son was born, 5/26/15 chemical, 6/24/15 chemical.
So my BBT has been higher, almost daily this whole cycle so far, compared to the last few months that I tracked. Nothing else has changed...has this happened to anyone else? Look at the difference with my base lines. :-/ no idea what's going on. I was even at 98.0 today, it never gets that high!