AF due today 06/19 BFN 06/18 urine; waiting on blood test, could I still be pregnant?

Rosaura
I tested at home 06/14/15 got a BFN. Obgyn tested 06/18/15 BFN,  then they did a blood test so I'm waiting 7days for the results. I'm sneezing, runny/stuffy nose, scratchy throat, and watery eyes. Threw up hours after ttc. Also used pre-seed during and before ovulation. Could I still be pregnant?