I would call your doctors office and it will direct you to the on call service who will call the on call nurse. When I had random bleeding... The one and only time... I actually ended up having a UTI that had been causing (what I didn't know were) contractions. My doctor called me after my husband called the doctors office. She didn't care that I hadn't filled two pads up she told me to go straight to labor and delivery to figure out why I was bleeding