Hi I'm Joanne also 43 and pregnant. I'm 7wks 3days. I have all of the same concerns as you do it's only natural. I haven't told very many people about the pregnancy yet as I'm waiting to get the 1st trimester over and done with. Congratulations on your new blessing!!!
Just found out I'm pregnant at 43 and researching everything I can about a successful journey.
Very sorry for your losses, Kim.
I think right now the only thing you can do apart from praying is just wait. At 11dpo, it's still a bit early to test. Even a blood test could be iffy. Were I you, I'd either get a HPT and test in a week, minimum, (I believe I tested with #3 at 18dpo and got my BFP) or go see a doctor to get the blood test.
I wish you much luck and hope that everything turns out well for you.