I am an only child and just had my first child.
The choice to have another child is not up to anyone but you.
I would think that if you do not have adequate family support (as a backup to look after your children) and if a second child causes you to worry so much, then do put off the thought until things are more settled.
There are women who give birth to healthy babies after multiple miscarriages, so you'll just have to see how it goes and hope for a smooth pregnancy should you have another one. Good luck.
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