A little help PLEASE so confused

So according to glow I ovulated January 26th and was suppose to get my period on Friday feb 7, I tested with clear blue Monday the 3 and it come out negative. Could I be pregnant or just a late period due to my d&c December 6th 2013?  I'm just very confused on dates since my miscarriage at 12 weeks. Any one similar or have any tips for me 

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