Bleeding while pregnant (not a miscarriage)

Jessica

I've been bleeding heavy on and off sense yesterday and was spotting on and off a few days before no pain other than some mild on and off back pain and I have a yeast infection... but I went to the ER last night and my baby is perfectly healthy and they had no idea why I was bleeding.... anyone else know what it could be? or also had something like this while pregnant? Was your baby okay?