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I had sex while taking amoxicillin a week before my inactive birth control pills started. How soon can I take a pregnancy test? I started spotting 2 days before my inactive pills started and it continued for a total of 5 days. Its now been 3 weeks since w

The . The spotting you experienced is a sign that your birth control pill efficacy was affected. There are pregnancy tests available that can detect pregnancy up to 5 days before your period. Recall when the first day of your last menstral period was (last month). If you miss your period 30 days later, that is the best time to take a pregnancy test. Taking a pregnacy test too early between periods can produce a false negative result. This is because the pregancy test is testing for the 'pregancy hormone' which take the body time to be detectable in your body. Read more...
Three weeks. You may do a pregnancy test three weeks after the episode of sex in question or if you miss your period by 4-5 days. If the result is negative repeat the test 4-5 days later unless you get a period by then. Use first morning urine and follow the instructions for the test carefully.
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Could it b possible for birth control pills to interfere with a pregnancy test?

No. A pregnancy test measures a hormone called hcg. This is not an ingredient in birth control pills. The way birth control interferes with a pregnancy test is by preventing pregnancy altogether. Best of luck! Read more...
Birth control pills. Birth control pills prevent pregnancy. However, if someone gets pregnant on these pills because of several factors, they don't cause any false results with pregnancy test. Read more...

Can birth control pills cause a negative pregnancy test?

If they work. they will cause a negative pregnancy test by stopping you form getting pregnant. If you got pregnant on pills, the test would still be positive. Good wishes. Read more...