Hi, As you had sex within 3 days of your stoppage of bleeding, your chances of pregnancy are less. But as the chances are still there, you can go for urine pregnancy test if you miss your next normal periods. Do allow 3-4 days before concluding that you have missed periods. Your present symptoms cannot be attributed to pregnancy as it is too early to have such symptoms due to pregnancy. I hope the above information helps you. Thanks for writing into healthcaremagic.