I had unsafe sex on 27th ,popped an ipill on 28th and got my regular period on 29th (which was my expected date ) this month I was supposed to get my period on 26th ,I am already 9 days late ,I have got my pelvic ultrasound which is normal ,I have also done 2 urine tests one on 5th day and one on 7th both were negative ,my doc has told me to start Deviry 10 mg ,its my fourth day and no signs of period or pregnancy,could I still be pregnant ?