Hi i had unprotected sex on march 22 which was

Patient: Hi i had unprotected sex on march 22 which was my ovulation date. I was suppose to get my period on April 6th and til this day April 21 have not yet got it. I took 2 pregancy test 9 days after my missed period but they came out negative. Could i be pregnant still ? My period is regular but i have not got any pregancy symptoms. Help

Doctor: