What do you do when you know your calling but you have absolutely no way of making it happen?

I chose a field I'm not really passionate about but the field I am passionate about I can't do because I'm held back by money and science.

I used up all my funds to go back to school for it and I'm not good in chemistry to study it. But I know it's what I'm meant to do. It's like a gut feeling. I've never felt so strongly about something so strongly before.
What do you do when you know your calling but you have absolutely no way of making it happen?
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