I heard this expression and I don't know what it means. I googled it and it was mostly financial meanings. But mine is not. I'm writing the context exactly.
The bottom kind of dropped out when I heard that Amanda was pregnant. Because she wasn't able to take care of herself at that point let alone take care of a child.
Thank you.
Best Answer
I'd agree with both comments: the statement is easily understandable, but the image is overdone. You might instead try something like "My heart sank when I heard..."
Or, of course, you can use it anyways, and if enough people imitate you it will become accepted.