My last period dec 1st I got my period 12th...

Dear Customer
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Is the blood drops you had at 12th of this month counted as period ?
this is called spotting , which is as you have discribed , on the other hand , period is a blood flow 
Is it possible that you are pregnant ?
its possible , although we dont have enough medical information about your medical condition 
What to do next ?
1. do a pregnancy home test 2 times for the following 2 days 
2. reconsult your doctor soon ( in less than a week ) in any case wheather you are pregnant or not 
3. pay attention to your health , and have plenty of rest 
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Kind Regards