I just recently hadn't DD 12-4-15 and I was told my midwife to watch the 3week period of highest fertility. However, me and my partner had unprotected sex the day before the 3week window so to speak, any who, I have been feeling very nauseous since then and having mucas with a slight bit of blood. Could this be a sign? I didn't have any sort of spotting with my first child and I am just curious to any ideas of what this could be. Thanks