Clearblue showed earlier O than expected? HELP!?

Sakinah
Clearblue easy advanced digital opk showed a solid smiley this morning. However Glow said my fertile cycle wouldn't be until 22nd of this month. When I put in the positive opk Glow changed my fertile dates. Should I believe Glows original prediction, or Clearblue easy's?
​***I DO currently have EWCM***
​ANY advice is greatly appreciated, ladies!! 
Baby dust to all!! 

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