 [ Symptoms ] when did i most likey have sex to become pregnant  i got my period on august 1st i was expecting my period september 1st but it did not come i took a pregnancy test today the 10th the test was positive and it said i might be 2 and up to 3 weeks since ovulation it also said my doctor would date me at 4 5 weeks pregnant i am just really confused by all of this and i would like an estimation on what day i had sex to become pregnant thank you [ Disease ] that is a really good question basically it is a normally harmless virus that most people already have but immune suppressing drugs can cause it to reactivate and do damage here is a link to a wiki article about it <link> and a link to an article about the risks to ms patients <link>#3