Should I take vitamin b6 and unisom to prevent morning sickness?

[Hm2244]

Hi, I suffer from emetophobia. This is my third pregnancy/baby. I'm currently just over 4 weeks.
Should it ake b6 and unisom to prevent morning sickness? Or do I take it if morning sickness starts ?
Thanks!
Living in fear.

Can you get unisom in the UK?

Yes, there is evidence the b6 reduces morning sickness. I took it alongside a prescribed antisickness (which I suppose worked in the same way as unisom, just a different antihistamine).

I've ordered it from US. But should I take it as preventative measure or only once it kicks in? Thanks