Zofran

i have just started taking Zofran for my morning sickness, and im starting to feel horrible about it. It makes me feel 100% better. I am able to work and eat after i take it. But there are so many commercials and sites that state it can cause birth defects. i try and hold off from taking it the best i can but if its a bad day i can not function properly because im throwing up or feeling sick and exhausted on top of it. :( i feel helpless and like i am putting my baby in danger. has anyone taken this and their baby was healthy??