pink discharge

Hey guys I had some pink discharge yesterday. I had to switch my ob after my first appointment and after that examination she said I was about 6-7 weeks. I went to the er yesterday and they didn't say anything was wrong then they tried to do an ultrasound but could only see the yolk sack no heartbeat. I am trying my best not to worry because I'm not feeling any pain the technician just said it might be too early. Has this ever happened to anyone I'm so confused