Weird taste?

Elizabeth • Elizabeth, 26. TTC baby #1 for 5 years now. Two losses, 11.30.11 @ 7 weeks, and 11.28.12 @ 16 weeks.
I'm 10DPO today, AF is due June 4. For the past 3/4 days I've noticed a weird taste in my mouth. It's like a strange aftertaste, even if I've just brushed my teeth. I wouldn't call it metallic, it's just weird. Some foods are even tasting different. I've never experienced this before. Anyone?