If you are on the birth control pill, it can take a few days and sometimes even several weeks for pregnancy symptoms to get noticed. Look for early signs of pregnancy, including a missed period, nausea, tenderness in the breasts, and a persisting headache. You may take a home pregnancy test to check, but sometimes you may need to do another test after a few days to a week to get a more accurate result, depending on your cycles. Your primary care provider or doctor can help you figure out the right time to test and the best kind of test to take.