I'd say it's not normal. Itching is always a sign that there's something going on down there.
I'd call your doctor for another check. Tell him you threw it up and maybe he could prescribe the treatment as a cream. I remember I was prescribed a cream for yeast infection last pregnancy, but I can't remember the name!
In the meantime I suggest you quit sugar, and bread, and starchy food... Yeast live on sugar, so it'll help reduce the infection
Seems as if its irritated. Yeast infections are often times treated with anti-biotics prescribed by a doctor as a result i would advise you to return to him/her. However you can try and prevent its re-occurrence by drinking plenty of liquid especially water to flush your system. Cranberry juice (the red one) is a good thing to drink, ensure your undies are properly sunned,do not use douche to wash your vagina and keep it dry as much as you can. Good luck and safe delivery