Im 4 days late on my period and I'm never late. Last night after sex there was s tiny bit of blood so I naturally thought I had started my period. I put a tampon in and took it out in the middle of the night and not 1 drop of blood... Woke up this morning and no blood. I have been testing the past week and have gotten all BFN's. My sister in law told me light bleeding after intercourse is normal in early stages of pregnancy. Google said the same thing.... Could I be pregnant? And if so why haven't I got a BFP yet?