Aih, I totally understand your worry, memang banyak mums dalam WhatsApp group aku yang panik gak dengan benda ni waktu pregnant. The good news is that booster vaccines during pregnancy have been studied and approved for safety, especially in the second and third trimester (you're already at 16 weeks, which is actually a good time), and many doctors actually encourage it to protect both you and baby. Takde harm to your baby, actually, antibodies yang you develop boleh protect baby after birth! Best approach is to have a proper chat with your OB/GYN about your specific concerns so they can ease your mind with facts, because at the end of the day that's who knows your pregnancy history best. Masa aku dulu pregnant, after I spoke to my doctor directly semua anxiety tu hilang, so worth the conversation!