Morecake
I'm so sorry 
You have not let anyone down I promise. I do not feel silly for joining an AN thread and having to leave.
And please do take real comfort that as someone else said people go on to have successful pregnancies after miscarriages. Hey, look at me, I'm here waving my pom poms for a 4th attempt after 3 in a row. It does happen.
You should know that every single pregnancy is genetically and completely different. New lining, new egg, new sperm. New start. There is absolutely no reason why your next pregnancy shouldn't be a take home one.
Look after yourself xx