My stomach is hard, mainly in the center of it. I am slim for my height (5 ft 1, 95 lbs.) so that might be a reasom why I can feel the pulsations of my heart throughout my entrie upper and center abdomen. I was constipated last week, but now I am almost back to regular bowel movements, but this morning I got this really weird taste that came up my throat and into the mouth... it tasted like throatup, blood, and maybe metal (sorry its hard to describe) Plus I havent had my period this month, but I was very stressed the week prior to it, so it must of stopped it. I'm 14 years and 6 months and have never had a physical relationship. Help!