2-3 years ago, I had a sexually encounter. A friend noticed two small rashes on my back a few weeks later . Nothing on my hands or feet. Although i noticed prior to that a sore in my mouth that did not last very long. There was no oral sex involved. About 6 months ago I read up and got concerned I might have acquired it. I went for an RPR test and it came back negative. I looked online and saw different statements regarding the accuracy of the RPR test during the latent stage. 1) What is the accuracy of that test and should I be re-tested?, 2) Is there a better test that should be performed when syphillis is in its latent stage?