Hi, TPHA is the specific test for detecting syphilis-the Treponema Pallidum Haemagglutination Assay. This is done if two VDRL tests are reported positive. A positive test means you are infected. The possible complications of untreated syphilis in pregnancy are abortions,premature labor, intra-uterine growth retardation and preterm labor along with early neonatal deaths. Treatment is with penicillin. You should see a specialist as soon a s possible and get treated to avoid pregnancy complications. Your partner may also need to be assessed and treated if needed. Wish you good health.