Actually - yes. A period that is shorter or lighter than usual can be a sign of pregnancy. It can also just be related to hormonal shift and the amount of endometrial lining that has accumulated that cycle. If you are at risk for pregnancy (unprotected intercourse within this cycle) then take a test. If it is negative and your next period is late, retest at that point. The best time of day to test is your first urine of the morning as it has the highest concentration of hcg.
best wishes
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DrStephanie
