Pork recall

I don't know if anyone else has heard about the pork recall due to possible listeria bacteria, but I seen it on the news and am now worried about the health of my baby because I had ate pork at Thanksgiving. Does anyone know how long it would take for symptoms of listeria to show up and what should I do to make sure I don't have it? I'm 38 weeks and I just don't want anything to happen in this last week of pregnancy.