I had sex for the first time two weeks ago and again last week. Condoms and the withdrawal method were used both times. After each time, we filled the condom with water to make sure that there weren't any leaks. I am not on any other birth control. I have been having brown spotting for the past three days but no cramps or normal period symptoms. My period is due next week. Should I be worried about the spotting? Is there any way I could be pregnant?