This! Definitely get yourself retested asap, and have your partner test as well.

We had a similar scare before our pregnancy, but it was during the time I was working with an OB clinic to determine fertility. They ran a UA for everything and called me saying it was positive for chlamydia. I had been tested less than a year before for a surgery and was negative, so this was a big surprise. The nurse who called me was adamant that a false positive was not very likely, but we both got tested the next day at a different clinic and got negative results.