I had a scan last Wednesday I'd a been 5 weeks 6 days they saw nothing, midwife said my uterus looked as if it was preparing for a pregnancy today at 7 week's scan was repeated, this time they saw a sac, just a sac midwife said it's normal and I have another scan in two weeks time I can't help but expect the worse my hcg levels are doubling as normal, does it sound like an ongoing pregnancy or has anyone had this sort of experience I'm very worried as I had a miscarriage in march