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Any changes in the menstruation
can be an indication of pregnancy
. If your periods were lighter than usual and you were involved in unprotected sexual intercourse, then this can be a sign of pregnancy.
Another possibility that needs consideration (in view of heavy periods
a few weeks early followed by positive home pregnancy test) is abortion.
A careful examination by your gynecologist and ultrasound
examination is warranted to confirm the possibility. So do visit your doctor at the earliest.
Hope this helps.
Wish you good health.