No since starting JUDDD, no. This might sound like a weird question, but have you eaten pine nuts recently? Or anything containing them e.g. pesto? I had a horrible metalic taste in my mouth one week last year and when I googled the symptoms, I came up with 'pine mouth'. Apparently some pine nuts imported from China were becoming tainted and causing it. I'd been eating them on salads and on pasta etc. I think the consensus was that it was unpleasant but not harmful. My symptoms cleared up after a week or so, but it's made me very cautious about eating pine nuts!
Probably best to get it checked out with the doctor, though, to be safe.