Hi Doctor, I was tested for RPR with confirmatory test when I was pregnant, (tests were done around December 2015 and February 2016) the result for the RPR was reactive 1:4 with a negative confirmatory test. I had this test done twice during pregnancy with the same results. I gave birth on May 5th 2016 and I was tested for the same on 5/23/2016 with a result RPR reactive 1:8 and confirmatory test reactive, so I was told that means I have Syphilis, but first of all I have been sexually with one men only my entire life (my husband), then I had unprotected sex since I was trying to get pregnant around January 2015, I stopped having sex on April 2016 till today, my husband was tested for the same with non reactive results. My question is how I could of get infected? The only thing different from the day I gave birth to today was that I got a tdap vaccine 3 days after delivery. How long it will take to syphilis show positive in the labs from the day one gets infected? Also I had that test done before in 2013 with a false positive too.