Paranoid of Listeria

Ok so I’m about 6 weeks pregnant now. Last week I was sick but I wasn’t sure of what. I tested for COVID and wasn’t that so assumed it was just the flu. However, I just found out you cannot eat deli meats while pregnant. I had been eating ham sandwiches perhaps three times a week. Now i’m paranoid that the sickness was listeria and I’m scared for my baby. Would the effects on my baby have been immediately like ex: miscarriage? I have my first appointment in about a week and I’m just so scared