I am 26 1/2 weeks with twin girls, fraternal not identical, and I had minor bleeding at 6 weeks. The doc said that there was possibly a third egg that didn't stick for whatever reason, not fertilized or not implanted or whatever and my body just flushed it out, but the other two stuck. The mucus plug takes a little bit of time to form so it's possible that the one will stick and be fine and the other one nature will take care of.
