Hello, I have a Metallic taste in my mouth, my ribs ache alittle (on the side) I am going to the bathroom aliitle more than usual. Tired alittle more than usual too. I feel some burning from my stomach to esophagus(sp) My neck has been constantly itchy for the past 3 weeks. I took a pregnancy test a couple days ago and it was negative, perhaps I tested to early? What do you think, Doctor?