Have 3 Questions! Negative upt result?

My period is regular  comes every 27-31 days. Had unprotected sex actually he did not ejaquated on 26th June means 46days ago which was my cycles 25th day. For safety took ipill Within 24hours. In 29Th june means on 28th day of cycle got period like bleeding with heavy flow(expected date 2July). 3days heavy 1day light 1day on tissue total 5days. After 31days of that bleeding, means on 30th July again got second period after ipill intake which lasted 4days. 2.5 days period like flow, 1day light and then on tissue. Today after 46days of that deed took Two Urin pregnancy Test with morning sample came negative.Now my Question is 1) On 29th June was not It my period? 2) On 31st July Was not it my period? 3) What are chances of pregnancy after those two periods and Negative Upt result?