Me and my boyfriend have been ttc for a year and I've been off birth control since then. And just recently for the past 3 months my cycle has been exactly 28 days. But this month my period is now 5 days late and all the pregnancy test say negative. For the past week I've been fatigue, nausea, headaches, and loss of appetite. Yesterday I had a little bit of spotting after having sex. I have taken 7 test and all come out negative. Any ideas?