3 days missed period. i was suppose to start on the 31st of january. i have pink/ brownish light bleeding(not like your normal period) light cramps

Pregnancy worries?: It can be hard to guess whether a woman is pregnant or not. A home urine pregnancy test gives a reliable result by 3 weeks after sex (3 weeks after when conception might have occurred), or 1 week after missing a period, or after having a "weird" period. If done sooner, a positive result is likely real, but a negative result may be due to testing too soon, and thus lead to a repeat test.