Gastro bug. Pregnant. Advice please

Heidi.jowett • 24 years young pregnant with my first I'm pommie (English) been in Australia 6 years :)
Ok I'm pregnant and for the last 2 days I have had a Gastro bug nothing settles in my stomach even toast with just a small smudge of butter 
My partner and friend told me if it's not gone by tommrow go and see the doctor just incase I'm getting dehydrated and check on the baby 
I have a very bad gut fevers are terrible and I'm so energyless but it hasn't stopped my baby girl from doing her dances and karate kicks 
Do you think I should see the doctor or just wait it out ??