Terrified for my baby

I’ve had the worst morning sickness (All day vomiting) since 5 weeks. I’ve been taking Ondansetron (Zofran) for 10 weeks daily twice a day, because it’s the only thing that lets me keep water/food down. Now all I hear from people is how bad birth defects are from zofran usage... has anyone here actually experienced birth defects from using it?