i started getting the shot around december of 2008 ... the fist few months i had a regular period right up until the time came for my second shot, i started bleeding really heavy.... and ever since then there has been very little time were i havent bled and its april of 2010!!!!!!!!! its like i have been on my period for almost a year and 4 months..... whats it from and how do i make it stop!!??