I caught Gastro at the end of my holiday in Spain, I had sickness and
the runs and
became severely dehydrated and
ended up in hospital because I couldn't even keep water down - I think I was 13 weeks at the time. Baby will be fine as long as you are staying hydrated. I would contact your GP to find out if you can take the mess that you are on because I know that even many herbal remedies are frowned upon by the medical world.
It's not a nice feeling, and I sympathise with you greatly.