My cat is pregnant and just started vomitng is this a sign she's going into labor

I have never heard of this being one of the symptoms... Also none of the links that I usually post for people have this as a sign of labor. I would say for the mamma and kittens sake get her to a vet.

My cat is pregnant and just started vomitng is this a sign shes going into labor
I am not sure but usually yes