Need reassurance.

I know that this topic is mentioned a lot, but today at 7+5 my symptoms have kinda just gone. I have the tiniest bit of breast pain but aside from that I feel fine. I'm so worried it will be a mmc. This is the furthest I've ever been in a pregnancy and I'm terrified to lose another baby :( I read so many horror stories of women going to their first scan to find the baby had stopped growing around 8 weeks and it's all I can think about. Help! I've already seen baby's heartbeat at 6 weeks, but I know it doesn't mean there could still be one now. Please please please tell me you've all gone through this at some point???