Bad taste in mouth, HELP!!

Madison • Vas reversal 6/2013. IVF 10/2015. FET 12/1/2015. First ever Positive Pregnancy test 12/6/2015!! Baby due August 2016! :)
I have a bad taste in my mouth. I have heard that some pregnant women get this, which is why I am posting here. I have not been pregnant and still have 2 days to go before I can test, but please help get rid of this taste! Even coffee won't do it! Please help! Taste like when I had to get a scan with contrast years ago and won't go away. :(