I was the same as you but its true with each week that passes I started feeling more and more confident and checked every time I went to the bathroom and I never saw any blood or spotting so that kept giving me courage. I had no reason to suspect a mc but I still worried about it anyway I think most of us do. But I was determined to trust in God and know that he was taking good care of this little angel. A couple of times I though bugger it I am just going to have a scan to check there is a baby in there, but I ended up coming to my senses and letting the fear pass over me. We just had our first scan this week at 12 weeks and guess what there is a little baby in there with a strong heart beat of 155bmp and it was spinning around and flipping over and sucking its thumb. I was both relieved and amazed at what I was seeing on the screen. I am glad I waited till 12 weeks it made the experience so much more exciting. But there is absolutely nothing wrong if you go for a scan a bit early just for peace of mind.
Good luck with it and don't ever feel silly for feeling insecure. I even took a HPT a couple of weeks ago to make sure I was still pregnant, after it came back with a faint line I panicked even more so I wished I hadn't done that. Your really don't have long to go till your scan. Just keep yourself busy and stay away from the forum topics that get you panicked.