BBT higher then normal

Ok so I'm new at all this and just learning my body I've been checking my BBt every morning and lately is been up to 97 usually is 96.5 suposibly Sunday was my last day of fertile window Tuesday I had egg white cm, before that was watery then after watery as well, this morning I took my BBT was 97.? Does anyone knows or had this similar happen to you or someone can give me some kind of advice??