I am 36 female. My lmp is 21st aug 2020. On 27th aug I took unwanted 72 within 14 hours of unprotected sex. On 3rd september I had very light bleeding and spotting. On 27-28 I took deviry. 3 pills only. Today 6th day I did not get the period. Did usg on 2nd october. Dr. told uterus thick but empty. No pregnancy. Did beta hcg on 3rd october <0.10. No pregnancy. Dis upt test 4 times. Negative every time. What to do? Why still my period not came? Is it still chances of pregnancy.?