What Causes Missed Periods And Flutters In Abdomen?

I haven't had a period since sept 2010 my doctor had taken a blood test and 20 pee test all where negative Jan 13 th he put me on provera for 10 day and it's feb 7th 2011 and still no period I went home I feel movement in my stomach and it feels like kicking my doctor refuses to give me an ultra sound to check me out can you explain what is going on with me