hi I've been taking trigestrel pills for about 6 months now. last month I had days when I missed the pill but took them when I remembered to. on the 25th of the last month December my boyfriend and I had unprotected sex. a week later I had light bleeding for 2 days or so. now I swear im experiencing pregnancy symptoms like abdominal cramps, backpain, exhaustion and tiredness. my breast are even starting to change colour. I get headaches everyday and get dizzy most of the time. I get hot and my heart rate increases when I move or get up. im concerned that I might just be imagining all those symptoms. could I really be pregnant or is it something else? I took a home pregnancy test last week and it was negative. was the test wrong or write. please help im really confused and concerned. thanx in advance for helpful answers