Light pink spotting 98.5 bbt

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Please help with this cycle. I'm a little confused. My last menstrual cycle was on May 9. Glow says my next cycle should start June 14. Today my bbt was 98.5 which is high for me. Usually when my period come I have a major dip. This is a spike. Not sure why?  Anyone have any suggestions ?   
​I should post a pic of my chart after I post this. Any help is greatly appreciated.