I had sex at the beginning of August (8/3) and we used the pull out method. I have been on birth control for almost 8 yrs and I am pretty consistent (90%) with my pills. I had a full period 2 weeks after I had sex, but now I have been spotting for about 4 days. Is there any way I can be pregnant? Or am I just being paranoid? I have not had sex since 8/3.