I am 9 weeks pregnant.And suffering from heartburn.?

Hello mommies and mommies to be.I am 9 weeks pregnant.I am not able to bear this heartburn i am going through.I didnt vomit till my 7th week but now for the past three days i am vomitting at nyt but there is no solid particle.Just yellow watery substance which is causing a burning sensation from my tummy til throat with a very bitter taste.Why do i vomit like this.Is it normal and how to reduce this.I have my first appt this friday.And one more thing after i vomit i feel the burning sensation and its severe even if i drink water.And i feel like something got stuck in my throat and the food pipe most of the time resulting in some difficulty in breathing(but not much).Any suggestions?