Hi, My age is about 16 years I have Severe pain below the belly button in the middle left right thripple sides but most in the middle only during period. Last month I got missed my periods then now it came but it became too painful. In my every periods I suffer from severe pain. When I was at 3rd standard mensuration came I was too small to efforts was not knowing what was it. From that time at least 6to 7 years I got my periods thrice a month but now it's ok but too painful.