hi, and good luck
the metilaic taste in your mouth is normally a good sign for pregnancy, unless of course you've just had fillings done at the dentist lol,
the brown show could be due to heaps of things, but could also be due in implantation bleeding,
the tired ness is also a good sign,,.but then that could be heaps of things to,
Sorry If I seem kind of vag, But its a bit too early to tell by doing a pg test as its to early for the HCG levels to be high enough to show up,
But then if you O'd early its possible that it may show,
so you could always test and see what you get or just wait till AF is due and test then
Hope I have helped, even if only a little bit
BABY DUST