hi Dr, i have been on nur-isterate injection for 2 years and my last shot was 1 year four months ago, and trying for a baby but i still cant conceive, so my cycle it has been normal which is 28 days cycle, but this month on day 24 cycle i started spotting pinkish bleeding and it got heavier and havier now is the 4th day, am i having implantation or my periods are 4 days earlier than usual?