British Pregnancy Advisory Service
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Advice needed please

Hi All,

My LMP was 22nd November and I had unprotected sex (one night stand) 4th December. We were as unprotected as it can get, he ejaculated inside me 3 times. My next period would have been due 19th December. I took 2 tests 24 hours apart 21st and 22nd December, both said 2-3 weeks pregnant which would be 4-5 weeks from my LMP. I had pretty bad cramping a couple of days before my period was due in December and I put this down to implantation. So far this all seems pretty straight forward, however..... I had sex with someone else 13th November and I keep thinking what if the baby is his when all along I have assumed it's not? This was still unprotected but no ejaculation. I did a pregnancy test 11th december (4 weeks from 13th November) and it was negative, too early to pick up from 4th December but a higher chance to be positive from 13th November. At my scan on 15th Feb they dated me as 13 weeks but it was only 12+1 from my LMP. Midwife dated my due date as 28th august, scan dated me as 23rd august. Am I being completely neurotic?

2 Replies

Hi There,

No, you are not being neurotic as it is quite complicated! Ultrasounds performed during the first 12 weeks of pregnancy are generally within 3 - 5 days of accuracy. So both the scan and your midwife are both technically correct. Due dates are really just a guide of the earliest likely date of birth, and this would all tie in with the sex you had in December. I hope all goes well, relax and good luck.

Best Wishes



Thank you for your help! 😊


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