Miscarriage starting or normal?

CamoCrafter
So for the past few weeks I have been having discharge white and gold color, severe backache cramps like period is trying to start. When I went to my Dr the other day I told her what was going on And she said it's from my placenta. I think I lost my mucas plug (it was small and green). Am I going to eventually loose my pregnancy? I have been also very weepy. I also had 1 other miscarriage in December 2015