I went to visit my boyfriend on the 25th of July and left the 28th within that time we had sex unprotectedly. which he also ejaculated in me . After two beats I decided to take a pregnancy test which came back negative I don't know if I took the test too early . Around August 15 I got my period. And it ended around the 20th since then I've had very sore breast to the point where it hurts to touch. I've also experience backaches and headaches. I've also found myself craving for foods I don't usually eat . I also feel bloated and have been experiencing lower abdominal pains . Is there a chance that I can be pregnant ?