My due date for periods was 22nd june and i missed them.I & my bf had sex on 30th may after my last periods.However, i experienced very light bleeding during my last periods i.e. for 2 days.I normally menstruate for 4-5days.We again had sex on 29th june. I thought i'd be
pregnant & took a test on 29th and got it -ve. Wht r the chances of pregnancy?