Swede, It is really frightening but so very common. As promised here is the link on bleeding/spotting in pregnancy. Great you have a proactive GP. One other thought, an ultrasound with Sydney Ultrasound for Women or one of the other high tech clinics might be able to give you more info about where it is coming from if it continues or you are worried but I hope it has all settled down now and that's the last of it!
Lucky, All the best for EPU tomorrow and for some lovely mature eggs in that great batch!