After getting married, I don't know why I am particularly afraid that I can't conceive, or that my baby is unhealthy ... what should I do? I'm almost depressed

Don't think like that. Now that science is so advanced, medicine is very dangerous. As long as you are in good health, you are not afraid of not being pregnant. Getting pregnant is a matter of time. Before getting married, you have to have a checkup just to see your health. Don't give yourself pressure. Pregnancy is not a dangerous thing. As long as two people love each other, there will be love.