Had sex a week ago. used spermicidal condoms pulled out and im on birth control which i take on time every day. i had slight cramps in stomach today but i think it may be due to stress since i cried yesterday could this be because of pregnancy?

Any symptoms due to a pregnancy would be triggered by the hormones that turn a simple urine pregnancy test positive. These are available over the counter at most dollar stores or supermarkets. The cited exposure risk is low.

Pregnancy is unlikely. Conception occurs within day or so of the sex. It takes 3 weeks for the embryo to make enough HCG for a positive pregnancy test. Blood test may be done a day after a missed period. Home pregnancy tests should be done 4-5 days after the missed period. If the result is negative repeat the test in 4-5 days. Use first morning urine and follow instructions for the test carefully.