Today my period is officially 10 days late. Last week I went to the doctor because I had a sinus infection and the did a test there and it was negative. I've also taken one hpt and also negative. I've stopped stressing over it to see if this is the problem. I just don't understand, I'm very healthy. :( my boyfriend and I haven't used condoms, he always pulled out so I'm wondering if, even with the bfn's, could I be pregnant?