Welcome. I'm so sorry you had to find us under these circumstances, that you lost your daughter to this syndrome. Preeclampsia can be brutally fast.
Usually in a subsequent pregnancy the onset is later and not as rapid. This can vary depending on any underlying conditions you might have that would raise risk of preeclampsia - these are mostly antiphospholipid syndrome (APS) and chronic hypertension. I'm pretty sure there's nothing wrong with your diet; diet isn't really thought to contribute to this unless you're from a region of the world with extraordinarily low calcium intake, and even then that's just your tendency to progress to seizures that's affected by calcium. It's generally thought to be a genetic condition that has to do with the depth to which the placenta implants during the first few weeks of pregnancy, and that has contributions from the number of prior pregnancies you've had, from your partner (his genes), and from any underlying inflammatory diseases that make it harder for your body to host a foreign organ (the placenta.)
Have you had your followup appointment? Has your blood pressure returned to normal?