Having Kids/TTC YEARS after having children?

Emily
Hey ladies! I wanted to ask everyone in here who has kids and is TTC/or has had children many years after their last child. I have a 10 and 8 year old and TTC Baby #3. I'm just curious 1. How was it different TTC so far apart and 2. What's your experience having children far apart in age? 
I'm currently 11 DPO, tested at 9 DPO with a BFN, but having only been trying for 2 months since I had my IUD taken out and stopped BC in December. And I'm just sitting here thinking about all the changes and things I might face TTC now after so long and what it will be like having a newborn after so many years. 
I'd love to hear everyone's stories! Thank you!