Aiyoh, one meal won't cause problems lah, many of us have accidentally eaten things we weren't supposed to during pregnancy! Dong guai in small amounts from food is generally considered low-risk, but since you're in your first trimester and worried, best to just mention it to your doctor at your next checkup so they can put your mind at ease. A lot of my mum friends have similar stories and their babies turned out absolutely fine, so try not to stress yourself too much about this satu kali incident, okay?