First, please take a deep breath; testing positive often simply means you have immunity from a past exposure. Your doctor will run confirmatory tests to see if there is an active infection and identify the specific virus or parasite. Treatment depends entirely on the culprit: Toxoplasmosis is often managed with spiramycin; Syphilis is treated with penicillin; Herpes (HSV) is managed with antivirals like acyclovir. Rubella and CMV generally require close monitoring via ultrasounds. Please consult your obstetrician or a maternal-fetal medicine specialist immediately. They will pinpoint the exact infection and tailor a safe, effective plan for you and your baby.