By "convince everyone", do you mean yourself and/or your husband/partner? Making the decision to try again after PE is a hard one. Educating yourself about high risk pregnancy is a good idea, as is making sure you have care providers you trust completely. It's such a personal decision, though, and what's right for your family may not be what is right for others. I did have PE twice, though not as early as you (born at 35 and 37 weeks). We decided to roll the dice again and ended up with twins. It was a roller coaster ride, but we ended up with two healthy babies born at 36 weeks after being first diagnosed with PIH at 22 weeks, mild PE at 31, moderate PE at 33, and severe PE post partum. After that, DH and I decided we were done, but now four years later we're making plans to have his vasectomy reversed to have yet another. My brain knows it's foolish, but my heart longs for another. We've decided we're willing to take the risk.
As for convincing anyone else, I recommend passing the bean dip. http://growing-fruit.blogspot.com/2009/12/pass-bean-dip.html
You don't need to explain or justify your decision, just reassure everyone that you have a fantastic care team lined up and are doing everything you can to ensure the best possible outcome.
Wife to Brett 6/30/02
Mom to Ethne Joy 10/12/03, 35 weeks, severe PE
Mom to Catie Grace 12/8/06, 37 weeks, mild PE
Mom to Riley Faith and Gavin Arthur 7/7/09, 36 weeks, PIH 22 weeks, PE 31 weeks, severe post partum PE
Mom to two angels 12/05 and 7/08
Running a Marathon for the PF: http://www.whatyourunningfor.blogspot.com