Bitter taste in my mouth and spitting a lot 😷😷

Ok Entering my second trimester here and I'm still feeling nauseous all day and for anything. My own saliva makes me nauseous I find myself spitting all the time because I always have a bitter taste in my mouth. I always have to carry gum everywhere I go but chewing too much gum makes my jaw hurt and I don't want to risk getting cavities. Anyone in the same boat?