Hi gina123
I don't think anyone has mentioned "pine mouth".
Do you eat pine nuts reguarly or have you gone through phases of eating them?
I had a period of time with a horrible taste, and yes it was bitter - and convinced I had something wrong with mouth or teeth, but when I googled it I found that some people get this after eating pine nuts - the ones that come from China apparently are a mix of types and some have this effect in some people.
I stopped the nuts (took 'em back to H&B!) and it disappeared after about a week or so.
I may be way off here but just in case....thought I'd mention it.
Hurdity x