question: i had my last depo shot nov 2011 and have been trying for a baby since my periods are usualy regualar and last around 5 days and usualy very heavy day and night this month i had a bleed 3 days late and only heavy for one day no bleeding at all during the night, but 3days of scanty on and off pink/bright red blood , is there a possibility i could be pregnant and when to take a test?