What Causes Watery Discharge?

hi i am trying for a baby and had a silent miscarridge on 19th november 2010, i thourght i might be spotting as when i go the toilet when i wipe there is a pinkish liquid on the paper which has been for 2days but today i have had quite a heavy flow in my sanatray towle but it isnt like my normal periods, its to watery, could you help?