I have been on medroxyprogesterone for only 1 dose, before then i rarely bleed any, but it is my last month before my next shot and i have been bleeding excessively. Enough to stain my clothing but not enough to show true signs of a period on my pad. It start 3/18/14 and now its 5/2/14 and i am still experiencing this light bleeding. How should I go out this?