My last period was August 6 2015. I ovulated on August 20th 2015. My boyfriend and I had sex around that time. I started spotting on August 29th 2015. I am still spotting without any cramps. My period was suppose to have started September 4th 2015. The spotting only happens in the morning time. I've taken two pregnancy tests and both were negative. I've been real moody and sleeping way too much. I'm not sure if its implantating bleeding or what. This is my first time trying to conceive.