I'm 18 years old. I used to take the pill because of cramps but I stopped 1-2 months ago. I had my period on June 20th. I then had intercourse for the first time on July 10th. He used a condom and did not ejaculate. The condom did not break and was put on properly. I then had a period on July 13th and it was like a regular period- soaked up several pads and stained my underwear. Then I had a period again on July 20th. So far it is also like a normal period- filling several pads with bright red blood. What could be the reason for that extra period? Is there any way I can be pregnant?