What Does Bloating, Nausea, Shortness Of Breath And Black Menstrual Discharge Indicate?

I m 14 female, and since two months, iv been having some strange unexplainable symptoms, like bloating, eye twitching/strain, nausea, cramps, vertigo, inability to breath well often, urinating very little, psychological irritation and getting satisfied with food quickly, also i experienced the symptoms of Anemia, i visited more than a doctor and they all said that I have some simple stress and anxiety, but it s not going away, i didn t have my period for 2 and a half months except for some black discharge, so are hormones causing this, and will it go away?