Diclegis vs Unisom/B6?! Help!!

Christina • FTM due November 2! 🎀💕🌸
I'm almost 7 weeks pregnant with my first. Dizziness and all-day sickness have been brutal to the point I can't drive really. 
Has anyone done the B6 & Unisom combo in replacement to Diclegis? How much B6 and which unisom? Frequency of taking it? 
My insurance doesn't cover Diclegis and its over $200! I have a Zofran prescription but  it doesn't still well with me.

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