It sounds like you have been getting regular surveillance. That's good! What does your cardiologist say about the size progression of your aneurysm or your current symptoms? That's where I would start. I became aware of my ascending aortic aneurysm in 2016. I'm at 4.7cm and share your anxiety about this condition. I decided to see the Aortic Clinic at Mayo in Rochester MN. I see them annually for advice and direction. As per this advice, I do everything under my control that can help manage this. I try to enjoy and feel grateful for everyday I have. Best wishes.