Listeria risk ????

I just saw on google prepacked salads can cause listeria and I’m freaked out. The past few days the cravings for them have been so intense and I’ve had a few servings from two separate bags. I’ve been eating the leftovers of one of the bags for my lunch and dinner today. I’m so worried I hurt the baby. I’m like debating making myself sick to limit the risk. Am I overreacting??? I’m 19 weeks 6 days.