Has anyone tried Diclegis for morning sickness?

This is my 5th pregnancy and every time I have terrible morning sickness for 3-4 months, so I asked my doctor for some kind of help. She gave me Diclegis and I'm wondering why she didn't give me a prescription for medicine but this pills right in the office? So I did a research and saw many bad reviews on it... Just wanna ask if somebody else is using this too. Like or dislike?