Hay, nausea at bitter taste sa ganyang stage ay super common talaga, marami sa amin na dumaan dito! Try eating small, frequent meals instead of heavy ones, at ginger tea or lemon water helps a lot of moms; a few of us swear by sucking on ice chips or preggie mints din to ease the nausea and that metallic taste. But since every pregnancy is different, better check with your OB just to be sure everything is okay and ask for safe remedies she can recommend for your specific situation. Hang in there, mama, for most of us this gets better after the first trimester!