Accidentally ate raw fish... freaking out!

So I’m at a family party and the caterer handed me what looked like a rice avocado tasting bowl. I took one bite and realized it was ceviche made with raw tuna. I’m twelve weeks pregnant and freaking out that I harmed the baby. I only took one bite. No one knows I’m pregnant so I didn’t want to spit it out in front of everyone. Do you think I’m ok since it was only one bite?