Alcohol use while pregnant and didn’t know it

I found out I was pregnant at around 7 months. I had no symptoms whatsoever of pregnancy - no morning sickness ever, regular periods, no food aversions or cravings, nothing like that. I had only gained around 10 pounds and figured this was due to me moving back home and snacking more often but I didn’t look like I was pregnant at all. This pregnancy came as a complete shock to me and has been extremely difficult because this pregnancy is also the result of rape.

Since finding out I am pregnant I have completely changed my eating and drinking (obviously stoped drinking alcohol) habits as well as added a prenatal vitamin to my daily routine. I am scared because since I had no idea I was pregnant, I was drinking a decent amount of alcohol without knowing I was pregnant. I’ve had two ultrasounds done and everything is completely normal with the baby - perfect brain, heart, and overall body development and the doctor has never found anything unusual or abnormal with baby. I am just nervous about what effects my previous alcohol use may have on my baby. So, I was wondering if anyone has been in a similar situation or could provide some comfort about my worries.