Hello Vikki and welcome to JustAnswer.
I'm very sorry to hear about your situation and hope I can help.
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It's not clear, but I take it that you're asking if you have a cause of action against your employer not your husband.
Unfortunately, based on the facts that I have before me, you wouldn't have any basis for a cause of action against your ex-employer, since it appears that you were an at-will employee and were not a victim of discrimination based on a protected characteristic.
This is because, as an at-will employee, you can be terminated by your employer at any time for any reason with or without any prior notice.
This is due to the employment at-will doctrine, which is codified in California Labor Code Section 2922, and states: "An employment, having no specified term, may be terminated at the will of either party on notice to the other. Employment for a specified term means an employment for a period greater than one month."
However, you may have a cause of action against your ex for tortious interference with economic relations, since it is was his harassment of you and your employer that ultimately resulted in your employer requesting your resignation.
Still, that would not be a worthwhile cause of action to pursue against your husband if he is only on disability and will not even be able to pay his court mandated monthly payments to you.
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Thanks and best of luck!