If all our duckies had to be in a row before we had children, nobody would have children and we wouldn't all be writing on this site. There is always, always, always something to worry about.
It's good to have a sense of responsibility, but often plain ol' anxiety tries to put on a "responsible" mask in order to rule us.
The economy will go up and down, just as it's always done, and we all just have to ride along. We seem to do all right anyhow! There will always be challenges, and people meet them.
Take inventory of your supply of love, of energy (well, that always needs help when you're a mom!), of creativity, of selflessness, of fun. Do you have enough of those? Can you make some more of those things so you have plenty?
Are you healthy? Are you grieving over your second boy? Are these factors contributing to your anxiety?
These are just things for you to think about.