I've had heartburn for the past 3 days and I just can't help but think, maybe this is it. I never, ever get heartburn which is why I'm a little excited but still very cautious as I don't want to get my hopes yet again. I thought maybe it was something I ate but it happens regardless of what I eat or if I've eaten. I also had a metallic/blood taste in my mouth earlier but I'm chalking it up as a side effect of the heartburn.