Could I still be pregnant?

Andrea
This is my 37th day in this cycle.  I usually have regular 28 day cycles.  And on Sunday January 11 after I showered when I wiped it was yellow EWCM with a little bit of blood.  I took a pregnany test today Jan 13 and it came out to be negative what's wrong? I still think I'm pregnant.  Have any of you ladies had anything similar?  

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