How soon after having unprotected sex on your "fertile" days can you take a pregnancy test.

Two weeks. Wait 14 days after the date of ovulation (the famous two week wait). A home pregnancy test can go positive earlier than 14 days, but if it's negative it may have just been too soon to test. If your period is late test again.
After missed period. You should wait 4-5 days after a missed period to do home pregnancy test. Use first morning urine and follow the instructions in the package carefully. A blood test may be positive sooner but you need to go to your doctor for that.

Related Questions

Fertile days were the 27-1st and I had unprotected sex those days, ttc baby #3. How soon can I take a test?

Take the test. If you want to know if you are pregnant, take a test. In today's world you do not need to wonder if you are pregnant or not based on symptoms. Pregnancy tests are available at any pharmacy and in minutes you will have your answer. They can detect a pregnancy 7-10 days after conception. The best time to take one is when you miss your period.

Last period was 28sept, fertile days was 10-13 October, Had unprotected sex on the 10th, I'm due my period the 26th October should I take a test?

Pregnancy testing. Too early to be positive. Wait till Oct 27th then blood test may be positive, urine positive later. Blood HCG detects 2-3 days after implantation, levels for urine HCG are higher so detects a few days later. For 28 day cycle ovulate on day 14, get fertilized on 15, 5 days to implantation and 2-3 d till positive, so 15+5+3= Oct 23, the earliest for blood, but may be a bit later.

If I take twice dosage of birth control pills after having unprotected sex in fertile days within 48hrs will it work as ecp as I heard it does?

ECP. It depends on the dose of the birth control pill, it can vary up to 5 pills PO now and repeat the 5 pills in 12 hours. Plan b is over the counter and is progestin only. Plan b works best the sooner it is taken to the unprotected sex act but may work up to 5 days. Another option is the copper iud. Most would lean toward Plan B as emergency contraception: otc, easily accessible, few side effects.