thanks so much..i feel so much better now that #2 is the father
Using a reverse calculator with your due date, you got pregnant around Dec. 16.
Very healthy sperm can last longer than 5 days. If you only had sex those two times, it was probably guy #2 on Dec. 8. The test you took at the end of Dec. was probably a day or two too early to detect it.
Anyway, if you want to calculate this yourself you can google "Conception calculator by due date" and you'll get a website that allows you to plug in your due date.
Sperm only stays in you for a least 5 days and i took a pregnancy in december at the end and i was not pregnant
approx 40 weeks from your due date works out around the 1st. But ask your dr he should be able to tell you the approx date :)