On 12th of July, me and my partner had unprotected intercourse, however there was no ejaculation involved and he pulled out 3 to 4 mins beforehand. My date of periods was 20th of July, it didn't arrive. I had pineapple juice for 2 days and it finally arrived on 4th of August, 14 days late. Meanwhile I had the urine pregnancy test done on 1st August which came negative. The periods went on for 3 days and ended on 4th day. Now my periods were due on 4th September and it hasn't arrived till now, I have again done a urine pregnancy home test done yesterday which came negative, there are no symptoms of pregnancy either, there is mild pain in my lower abdomen when I apply pressure. Is there any chance of pregnancy? Or there is disturbance in my cycle, what should I do please guide.