I had unprotected sex last month on 14th may but ejaculation was not done...only penetration was done. I got my periods on the same day in the night and it was my normal cycle of 5 days.In the month of April , I got my period on 7th April. I had done research on the internet regarding pregnancy test at home in which urine test was there..where we have to collect 1st urine and wait for 3/4 hours and check if white thin film like layer is formed or not..if not then you are not pregnant. There was no white layer ..What are the chances of pregnancy or it is only missed period..I was on antibiotics for few days in month of may and I m overweight