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I started having brown spotting yesterday, Sunday. My period is not due until tomorrow, Tuesday. I have experienced some light cramping off and on , but nothing as intense as the cramping during my period. My periods usually start off light but get heavy almost immediately with cramping so bad I can barely stand it. This bleeding is nothing like that. It has been light a spotty for 2 days with very little cramping Could this be implantation bleeding?? If it is when would be a good time for me to take a pregnancy test??