Unisom sleep aid and B6?

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So, I have morning sickness... Not just morning sickness, but all day sickness... It's wearing me down. So, I broke down and called my doctor and they told me to purchase Unisom sleep aid, and vitamin b6 over the counter. Please tell me you've had good experiences with this? Anyone? I need relief... I can't eat anything, and drinking is so far out of the question... If you all could tell me your experiences, I'd feel better about it. I've never had Unisom before. I'm planning on buying it after my class is over, and taking it starting tonight. Thanks ladies!