Zofran for nausea?

Hope • Baby girl born 08/05/15 Baby boy EDD 12/09/18
Anyone use Zofran for nausea prescribed by doctor, and have a normal healthy pregnancy and baby prior to this one? I have read lots of things about people's doctors prescribing it and a ton of other things about how it isn't safe. 
Thoughts? Suggestions?? Alternatives to ask about? I don't want to take something that will effect my baby but this nausea is almost unbearable and I cannot even eat right now :(