I'm Doug, and I'm very sorry to hear of your situation. My goal is to provide you with excellent service today. I have been a CA licensed attorney for more than 3 decades, and I handle employment law issues.
Unfortunately, there are no other options that you have to enforce your job security if you have already used up all of your FMLA----aside from putting off the surgery until you become eligible again for the FMLA leave and the protections that come with it.
Ask your employer (HR Department) which of the 4 models of determining when FMLA accrues so you will know when you are eligible again. The 4 models are:
1. Annually---beginning each January 1;
2. Or a fixed date such as the company's fiscal tax year or the start date of the employees;
3. A 12-month period beginning on the first day that you took your earlier FMLA leave; or
4. Looking back 12 months from the date that your next FMLA leave will start.
Option number 4 is the most commonly used, because it prevents employees from taking more than 12 weeks of leave at once.
If you have to take additional time off now, you will be at risk of losing your position if your employer chooses to replace you.
You may reply back to me using the Reply link and I will be happy to continue to assist you until I am able to address your concerns, to your satisfaction.
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I wish you and yours the best in 2016,