Maternal mortality

Saw on news a segment about woman dieing during or shortly after childbirth. At 10 weeks, and baby 2, i am concerned.. i read i am right in the spectrum of statistics that i would be at risk. Im 40, im considered obese, (actively obese) , considered healthy otherwise, and i have family history of stroke and heart disease. I had preeclampsia with my first, 16 years ago, the docs are same this round, and they saw signs of preeclampsia way before i did,so i believe im in good hands, but what should i look for? How can i prevent? Advice anyone? How should i approach my concerns with them?