Waalaikum assalam sis.. I'm so sorry you've been through this twice, it's totally normal to feel scared. First thing: please see your doctor or gynae before trying to conceive again , they need to check what happened & make sure you're properly supported this time. Jangan stress sendiri. A few of us mums have been through losses too, and honestly the emotional part is as important as the physical. Some of my friends found it helpful to talk to counsellor or support group, seriously. And when you do try again, keep your gynae appointments consistent, the monitoring itself dah helps rasa lebih aman. As for supplements, that's something your doctor will advise based on your tests & health. Don't buy things randomly, okay? Your gynae might suggest specific things for your situation. You're braver than you think. Take care of yourself first.