Anxiety about life changing in third trimester

I’m currently 35w5days with my first and At my last appointment we discussed how baby girl is still breeched. Because of this at my 36 week appointment if she isn’t head down they’re going to schedule a C-section when I’m 38 weeks. My whole pregnancy have been prefect, no sickness, minimal nausea, blood work had been spot on, easiest pregnancy ever. Since we discussed this I have been soooo anxious. Not about the C-section but just how different life is going to be. Don’t get me wrong My husband and I are both super excited for this miracle baby. We had been trying for 3.5 years and found out I was pregnant at an infertility ultrasound in December. We were caught by complete surprise, because at that point we had stopped trying. But I’m becoming anxious about it not just being us and our dogs. We’ll be together 10 years this fall and although we’ve had plenty of time it’s kind of sad that it will end soon. I feel like no one ever talks about this part of pregnancy. The end where your filled with mixed emotions. So excited yet so nervous about how much everything is going to change.