Please help!!!

Demi

Hi ladies im a first time mum and starting to get really worried, I’ve had 2 ultrasounds one at “6 weeks” according to my period but turns out I was actually only 5 weeks along now I’ve had another scan and I should be 10 weeks and they can’t still can’t find a heart beat… my doctor is saying it looks like I’m going the way of having a miscarriage.. but there could be a chance that the dates are wrong and it’s to small. Has anyone else experienced this? I’m so heart broken thinking the worst and don’t know what to do, this is all I’ve ever wanted and I feel like everything good that happens to me is too good to be true.