how do I get rid of this taste

I'm 5 weeks 4 days pregnant and I have a very bad weird tast in my mouth it goes away while I'm eating and drinking but then comes right back and I threw up twice I can deal with the vomiting but I really need to get rid of this taste I've tried mints they help while In my mouth and when I'm done it comes back I've tried lemon didn't work I've tried oranges and preggy pop drops and crystallized ginger and ginger ale nothing's working please help me