I've had sex this month (pull out method) and sex usually doesn't mess with my flow since my husband and I do it regularly. However this month my "period" came a week early my expected period was supposed to be from 2/10-2/16 but I spotted so lightly I only saw blood when I wiped for three days this week and nothing else. Now I've never had this happen before and I'm curious should I take a pregnancy test and when?