you might be lucky, but you've got to give your body time to adjust to not getting extra hormones from the pill. From what i understand it isn't really a 'period', but withdrawl bleeding at first. And rowan is right, there are only a few optimum days when you are really fertile, and that's about midway between periods - you can buy tests for this now, but as I said earlier, leave it a couple of months and let your body balance itself out - you never know, yo might be lucky, but if things don't hppen straight away don't worry You could do things like start taking folic acid go see your doctor and see what she recommends you can do for the best chance of conceiving.