So I have not had a period since September of 2014. However, I've taken at least five home pregnancy test and they've all came back negative. I am feeling a twitch/ fluttering in my stomach all through out the day . In the month of June I got a positive pregnancy test from the doctor , but I did a blood test and it was negative. I have had light spotting off and on a couple hours months ago but yet no period . What may be the problem??