I ate something I shouldn’t have - would I know if it caused a problem?

La

This is my first pregnancy, 6 1/2 weeks along and I haven’t even seen my doctor yet, so I didn’t know there were so many rules about what you can and can’t eat! I found out today you aren’t supposed to have cold meat, but I’ve had cold leftover chicken multiple times since getting pregnant. If I haven’t gotten sick does that mean I’m in the clear? Or can there be some sort of silent harm being done to my baby without me knowing?