Wa'alaikum assalam! Sayang, this is something you really perlu konsultasi dengan doctor atau OB-GYN you, okay? VDRL results boleh ada different reasons and they need to see your full medical history and do proper follow-up tests to explain what happened, I can't guess-guess about ini. The best thing is to book appointment with your doctor and tanya directly apa penyebab the result changed, and what it means for you and baby. Jangan worry sangat dulu, doctor will guide you properly!